Form 10-Q - Quarterly report [Sections 13 or 15(d)]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

__________________________________________

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period ended September 30, 2023

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number: 001-40392

DT Midstream, Inc.


Delaware						38-2663964
(State or other jurisdiction of incorporation or organization)						(I.R.S Employer Identification No.)

Registrant's address of principal executive offices: 500 Woodward Ave., Suite 2900, Detroit, Michigan 48226-1279

Registrant's telephone number, including area code: (313) 402-8532

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Trading Symbol

Name of Exchange on which Registered

Common stock, par value $0.01

DTM

New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company

Emerging growth company

☒

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Number of shares of common stock outstanding as of September 30, 2023:


Description						Shares
Common stock, par value $0.01						96,971,021

TABLE OF CONTENTS


		Page
	Definitions	1
	Filing Format	3
	Forward-Looking Statements	3
PART I — FINANCIAL INFORMATION
Item 1.	Financial Statements
	DT Midstream , Inc. Con solidated Financial Stateme nts (Unaudited)	5
	Notes to Consolidated Financial Statements (Unaudited)	12
	Note 1 — Description of the Business and Basis of Presentation	12
	Note 2 — Significant Accounting Policies	15
	Note 3 — Goodwill	15
	Note 4 — Revenue	16
	Note 5 — Earnings Per Share and Dividends	18
	Note 6 — Income Taxes	18
	Note 7 — Fair Value	19
	Note 8 — Debt	20
	Note 9 — Commitments and Contingencies	21
	Note 1 0 — Segment and Related Information	22
	Note 1 1 — Subsequent Event	22
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	23
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	31
Item 4.	Controls and Procedures	32
PART II — OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	32

Item 4.	Mine Safety Disclosure	32
Item 5.	Other Information	32
Item 6.	Exhibits	33
	Signature	34

DEFINITIONS

Unless the context otherwise requires, references to "we," "us," "our," "Registrant," or the "Company" and words of similar importance refer to DT Midstream and, unless otherwise specified, our consolidated subsidiaries and our unconsolidated joint ventures. As used in this Form 10-Q, the terms and definitions below have the following meanings:


Appalachia Gathering System						A 149-mile pipeline delivering Marcellus shale gas to the Texas Eastern Pipeline and Stonewall Gas Gathering

ASU						Accounting Standards Update issued by the FASB

Bcf						Billion cubic feet of natural gas

Blue Union						Blue Union Gathering System, a 398-mile gathering system delivering shale gas production from the Haynesville formation of Louisiana to markets in the Gulf Coast region

Bluestone						Bluestone Gathering Lateral Pipeline, a 65-mile lateral pipeline and two compression facilities gathering Marcellus shale gas to Millennium and the Tennessee Pipeline

Columbia Pipeline						Columbia Gas Transmission, LLC, owned by TC Energy Corporation and Global Infrastructure Partners

Credit Agreement						DT Midstream's credit agreement provides for the Term Loan Facility and Revolving Credit Facility

Distribution						Pro rata distribution to DTE Energy shareholders of all the outstanding common stock of DT Midstream upon the Separation

DTE Energy						DTE Energy Company, the consolidating entity of DT Midstream prior to the Separation

DT Midstream						DT Midstream, Inc., and our consolidated subsidiaries

FASB						Financial Accounting Standards Board

FERC						Federal Energy Regulatory Commission

GAAP						Generally Accepted Accounting Principles in the United States

Generation Pipeline						A 25-mile intrastate pipeline located in northern Ohio and owned by NEXUS

Haynesville System						Pipeline and gathering system which is comprised of LEAP, Blue Union and associated facilities

LEAP						Louisiana Energy Access Project gathering lateral pipeline, a 195-mile pipeline gathering Haynesville shale gas to markets in the Gulf Coast region

LNG						Liquefied natural gas

Michigan System						A 335-mile pipeline system in northern Michigan

Millennium						A 263-mile interstate pipeline and compression facilities owned by Millennium Pipeline Company, LLC serving markets in the northeast and supply from the northeast Marcellus region, in which DT Midstream owns a 52.5% interest

MVCs						Minimum volume commitments

National Grid						National Grid Millennium LLC

NEXUS						NEXUS Gas Transmission, LLC, a joint venture that owns (i) a 256-mile interstate pipeline and three compression facilities transporting Utica and Marcellus shale gas to Ohio, Michigan and Ontario market centers and (ii) Generation Pipeline, in which DT Midstream owns a 50% interest

Ohio Utica System						A new 20-mile pipeline system under construction including compression and dehydration facilities delivering Utica shale gas from producer wells to a nearby processing plant

Revolving Credit Facility						DT Midstream's secured revolving credit facility issued under the Credit Agreement

SEC						Securities and Exchange Commission

Separation						The separation and spin-off of DT Midstream from DTE Energy, effective July 1, 2021

SOFR						Secured Overnight Financing Rate

DEFINITIONS


South Romeo						South Romeo Gas Storage Corporation, a joint venture which owns the Washington 28 Storage Complex, in which DT Midstream owns a 50% interest

Southwestern Energy						Southwestern Energy Company and/or its affiliates

Stonewall Gas Gathering						Stonewall Gas Gathering Lateral Pipeline, a 68-mile pipeline in which DT Midstream owns an 85% interest, gathering Marcellus/Utica natural gas to the Columbia Pipeline

Susquehanna Gathering System						A 198-mile pipeline delivering Marcellus shale gas production to Bluestone

Tax Matters Agreement						The agreement that governs the respective rights, responsibilities and obligations of DTE Energy and DT Midstream after the Separation with respect to all tax matters

Tennessee Pipeline						Tennessee Gas Pipeline Company, LLC, owned by Kinder Morgan, Inc.

Term Loan Facility						DT Midstream's term loan facility issued under the Credit Agreement

Texas Eastern Pipeline						Texas Eastern Transmission, LP, owned by Enbridge Inc.

Topic 606						FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, as amended

U.S.						United States of America

USD						United States Dollar ($)

Vector						A 348-mile interstate pipeline and five compression facilities connecting Illinois, Michigan, and Ontario market centers, in which DT Midstream owns a 40% interest

VIE						Variable Interest Entity

Washington 10 Storage Complex						A storage system located in Michigan with 94 Bcf of storage capacity, in which DT Midstream owns a 91% interest

2029 Notes						Senior unsecured notes of $1.1 billion in aggregate principal amount due June 2029

2031 Notes						Senior unsecured notes of $1.0 billion in aggregate principal amount due June 2031

2032 Notes						Senior secured notes of $600 million in aggregate principal amount due April 2032

FILING FORMAT

This Form 10-Q should be read in its entirety. This Form 10-Q should be read in conjunction with the Consolidated Financial Statements and Notes to Consolidated Financial Statements and with Management's Discussion and Analysis included in DT Midstream's 2022 Annual Report on Form 10-K.

FORWARD-LOOKING STATEMENTS

Certain information presented herein includes "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to the financial condition, results of operations, and businesses of DT Midstream. Words such as "believe," "expect," "expectations," "plans," "strategy," "prospects," "estimate," "project," "target," "anticipate," "will," "should," "see," "guidance," "outlook," "confident," and other words of similar meaning in connection with a discussion of future operating or financial performance may signify forward-looking statements. Forward-looking statements are not guarantees of future results and conditions, but rather are subject to numerous assumptions, risks, and uncertainties that may cause actual future results to be materially different from those contemplated, projected, estimated, or budgeted. Many factors may impact forward-looking statements of DT Midstream including, but not limited to, the following:

•changes in general economic conditions, including increases in interest rates and associated Federal Reserve policies, a potential economic recession, and the impact of inflation on our business;

•industry changes, including the impact of consolidations, alternative energy sources, technological advances, infrastructure constraints and changes in competition;

•global supply chain disruptions;

•actions taken by third-party operators, processors, transporters and gatherers;

•changes in expected production from Southwestern Energy and other third parties in our areas of operation;

•demand for natural gas gathering, transmission, storage, transportation and water services;

•the availability and price of natural gas to the consumer compared to the price of alternative and competing fuels;

•our ability to successfully and timely implement our business plan;

•our ability to complete organic growth projects on time and on budget;

•our ability to finance, complete, or successfully integrate acquisitions;

•the price and availability of debt and equity financing;

•restrictions in our existing and any future credit facilities and indentures;

•the effectiveness of the Company's information technology and operational technology systems and practices to detect and defend against evolving cyber attacks on United States critical infrastructure;

•changing laws regarding cybersecurity and data privacy, and any cybersecurity threat or event;

•operating hazards, environmental risks and other risks incidental to gathering, storing and transporting natural gas;

•natural disasters, adverse weather conditions, casualty losses and other matters beyond our control;

•the impact of outbreaks of illnesses, epidemics and pandemics, and any related economic effects;

•the impacts of geopolitical events, including the conflicts in Ukraine and the Middle East;

•labor relations and markets, including the ability to attract, hire and retain key employee and contract personnel;

•large customer defaults;

•changes in tax status, as well as changes in tax rates and regulations;

•the effects and associated cost of compliance with existing and future laws and governmental regulations, such as the Inflation Reduction Act of 2022;

•changes in environmental laws, regulations or enforcement policies, including laws and regulations relating to climate change and greenhouse gas emissions;

•ability to develop low carbon business opportunities and deploy greenhouse gas reducing technologies;

•changes in insurance markets impacting costs and the level and types of coverage available;

•the timing and extent of changes in commodity prices;

•the success of our risk management strategies;

•the suspension, reduction or termination of our customers’ obligations under our commercial agreements;

•disruptions due to equipment interruption or failure at our facilities, or third-party facilities on which our business is dependent;

•the effects of future litigation;

•the Separation as a tax-free Distribution;

•the allocation of tax attributes from DTE Energy in accordance with the Tax Matters Agreement; and

•the risks described in our Annual Report on Form 10-K for the year ended December 31, 2022 and our reports and registration statements filed from time to time with the SEC.

The above list of factors is not exhaustive. New factors emerge from time to time. We cannot predict what factors may arise or how such factors may cause actual results to vary materially from those stated in forward-looking statements. Any forward-looking statements speak only as of the date on which such statements are made. We are under no obligation to, and expressly disclaim any obligation to, update or alter our forward-looking statements, whether as a result of new information, subsequent events or otherwise.

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

DT Midstream, Inc.

Consolidated Statements of Operations

(Unaudited)


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Revenues
Operating revenues	$	234	$	235	$	678	$	677
Operating Expenses
Operation and maintenance	58		65		176		189
Depreciation and amortization	46		42		133		126
Taxes other than income	7		7		22		23
Asset (gains) losses and impairments, net	(1)		—		(4)		(23)
Operating Income	124		121		351		362
Other (Income) and Deductions
Interest expense	38		35		111		99
Interest income	—		(1)		(1)		(2)
Earnings from equity method investees	(41)		(36)		(132)		(107)
Loss from financing activities	—		—		—		13
Other (income) and expense	—		—		(1)		—
Income Before Income Taxes	127		123		374		359
Income Tax Expense	33		7		102		65
Net Income	94		116		272		294
Less: Net Income Attributable to Noncontrolling Interests	3		3		9		9
Net Income Attributable to DT Midstream	$	91	$	113	$	263	$	285

Basic Earnings per Common Share
Net Income Attributable to DT Midstream	$	0.94	$	1.17	$	2.72	$	2.94

Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	0.94	$	1.16	$	2.70	$	2.94

Weighted Average Common Shares Outstanding
Basic	97.0		96.7		96.9		96.7
Diluted	97.5		97.0		97.4		97.0

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Consolidated Statements of Comprehensive Income

(Unaudited)


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Net Income	$	94	$	116	$	272	$	294
Foreign currency translation and unrealized gain on derivatives, net of tax	—		1		1		2
Other comprehensive income	—		1		1		2
Comprehensive income	94		117		273		296
Less: Comprehensive income attributable to noncontrolling interests	3		3		9		9
Comprehensive Income Attributable to DT Midstream	$	91	$	114	$	264	$	287

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Consolidated Statements of Financial Position

(Unaudited)


	September 30,		December 31,

	2023		2022
	(millions)
ASSETS
Current Assets
Cash and cash equivalents	$	30	$	61
Accounts receivable (net of $— allowance for expected credit loss for each period end)	146		161



Deferred property taxes	6		22
Prepaid expenses and other	18		18
	200		262
Investments
Investments in equity method investees	1,782		2,200

Property
Property, plant, and equipment	5,162		4,534
Accumulated depreciation	(814)		(728)
	4,348		3,806
Other Assets
Goodwill	473		473
Long-term notes receivable — related party	4		4
Operating lease right-of-use assets	42		31
Intangible assets, net	1,982		2,025
Other	31		32
	2,532		2,565
Total Assets	$	8,862	$	8,833

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Consolidated Statements of Financial Position

(Unaudited)


	September 30,		December 31,

	2023		2022
	(millions, except shares)
LIABILITIES AND EQUITY
Current Liabilities
Accounts payable	$	124	$	119

Short-term borrowings	125		330
Operating lease liabilities	15		16
Dividends payable	67		62
Interest payable	39		10
Property taxes payable	17		29
Accrued compensation	13		20
Other	24		28
	424		614

Long-Term Debt	3,064		3,059

Other Liabilities
Deferred income taxes	1,014		923
Operating lease liabilities	30		19
Other	109		64
	1,153		1,006
Total Liabilities	4,641		4,679

Commitments and Contingencies (Note 9)

Stockholders' Equity
Preferred stock ($0.01 par value, 50,000,000 shares authorized, and no shares issued or outstanding as of September 30, 2023 and December 31, 2022)	—		—
Common stock ($0.01 par value, 550,000,000 shares authorized, and 96,971,021 and 96,754,549 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively)	1		1
Additional paid-in capital	3,479		3,469
Retained earnings	608		547
Accumulated other comprehensive income (loss)	(9)		(10)
Total DT Midstream Equity	4,079		4,007
Noncontrolling interests	142		147
Total Equity	4,221		4,154
Total Liabilities and Equity	$	8,862	$	8,833

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Consolidated Statements of Cash Flows

(Unaudited)


	Nine Months Ended
	September 30,
	2023		2022
	(millions)
Operating Activities
Net Income	$	272	$	294
Adjustments to reconcile Net Income to Net cash and cash equivalents from operating activities:
Depreciation and amortization	133		126
Stock-based compensation	15		13
Amortization of operating lease right-of-use assets	14		14
Deferred income taxes	91		51
Earnings from equity method investees	(132)		(107)
Dividends from equity method investees	152		125
Asset (gains) losses and impairments, net	—		(17)
Loss from financing activities	—		13
Changes in assets and liabilities:
Accounts receivable, net	15		19
Accounts payable	(4)		(2)
Interest payable	29		35
Other current and noncurrent assets and liabilities	29		10
Net cash and cash equivalents from operating activities	614		574
Investing Activities
Plant and equipment expenditures	(622)		(173)
Proceeds from sale of notes receivable	—		22
Distributions from equity method investees	405		3
Contributions to equity method investees	(6)		(4)

Notes receivable — third party	—		2

Net cash and cash equivalents from (used for) investing activities	(223)		(150)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	—		591
Repayment of long-term debt	—		(596)

Borrowings under the Revolving Credit Facility	390		—
Repayment of borrowings under the Revolving Credit Facility	(595)		—

Repurchase of common stock	—		(3)
Distributions to noncontrolling interests	(14)		(11)

Dividends paid on common stock	(196)		(182)
Other financing activities	(7)		—
Net cash and cash equivalents from (used for) financing activities	(422)		(201)
Net Increase (Decrease) in Cash and Cash Equivalents	(31)		223
Cash and Cash Equivalents at Beginning of Period	61		132
Cash and Cash Equivalents at End of Period	$	30	$	355

Supplemental disclosure of cash information
Cash paid for:
Interest, net of interest capitalized	$	76	$	59
Income taxes	21		9
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable and other accruals	$	109	$	60

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Consolidated Statements of Changes in Stockholders' Equity

(Unaudited)


				Additional Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interests
	Common Stock
	Shares	Amount										Total
	(dollars in millions, shares in thousands)
Balance, December 31, 2022	96,755	$	1	$	3,469	$	547	$	(10)	$	147	$	4,154
Net Income	—	—		—		81		—		3		84
Dividends declared on common stock ($0.69 per common share)	—	—		—		(67)		—		—		(67)
Distributions to noncontrolling interests	—	—		—		—		—		(8)		(8)
Stock-based compensation	135	—		1		—		—		—		1

Other comprehensive income, net of tax	—	—		—		—		1		—		1
Balance, March 31, 2023	96,890	$	1	$	3,470	$	561	$	(9)	$	142	$	4,165
Net Income	—	—		—		91		—		3		94
Dividends declared on common stock ($0.69 per common share)	—	—		—		(67)		—		—		(67)
Distributions to noncontrolling interests	—	—		—		—		—		(2)		(2)
Stock-based compensation	12	—		6		(1)		—		—		5


Balance, June 30, 2023	96,902	$	1	$	3,476	$	584	$	(9)	$	143	$	4,195
Net Income	—	—		—		91		—		3		94
Dividends declared on common stock ($0.69 per common share)	—	—		—		(67)		—		—		(67)
Distributions to noncontrolling interests	—	—		—		—		—		(4)		(4)
Stock-based compensation	69	—		3		—		—		—		3


Balance, September 30, 2023	96,971	$	1	$	3,479	$	608	$	(9)	$	142	$	4,221

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Consolidated Statements of Changes in Stockholders' Equity

(Unaudited)


				Additional Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interests
	Common Stock
	Shares	Amount										Total
	(dollars in millions, shares in thousands)
Balance, December 31, 2021	96,734	$	1	$	3,450	$	431	$	(10)	$	149	$	4,021
Net Income	—	—		—		81		—		3		84
Dividends declared on common stock ($0.64 per common share)	—	—		—		(62)		—		—		(62)
Distributions to noncontrolling interests	—	—		—		—		—		(4)		(4)
Stock-based compensation	57	—		3		(1)		—		—		2
Repurchase of common stock	(57)	—		—		(3)		—		—		(3)
Balance, March 31, 2022	96,734	$	1	$	3,453	$	446	$	(10)	$	148	$	4,038
Net Income	—	—		—		91		—		3		94
Dividends declared on common stock ($0.64 per common share)	—	—		—		(62)		—		—		(62)
Distributions to noncontrolling interests	—	—		—		—		—		(3)		(3)
Stock-based compensation	—	—		5		(1)		—		—		4
Taxes and other adjustments	—	—		—		(1)		—		—		(1)
Other comprehensive income, net of tax	—	—		—		—		1		—		1
Balance, June 30, 2022	96,734	$	1	$	3,458	$	473	$	(9)	$	148	$	4,071
Net Income	—	—		—		113		—		3		116
Dividends declared on common stock ($0.64 per common share)	—	—		—		(62)		—		—		(62)
Distributions to noncontrolling interests	—	—		—		—		—		(4)		(4)
Stock-based compensation	17	—		4		—		—		—		4
Taxes and other adjustments	—	—		—		(1)		—		—		(1)
Other comprehensive income, net of tax	—	—		—		—		1		—		1
Balance, September 30, 2022	96,751	$	1	$	3,462	$	523	$	(8)	$	147	$	4,125

See Notes to Consolidated Financial Statements (Unaudited)

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 1 — DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION

Description of the Business

DT Midstream is an owner, operator, and developer of an integrated portfolio of natural gas midstream assets. The Company provides multiple, integrated natural gas services to customers through two segments: (i) Pipeline, which includes interstate pipelines, intrastate pipelines, storage systems, lateral pipelines including related treatment plants and compression and surface facilities, and (ii) Gathering, which includes gathering systems, related treatment plants, and compression and surface facilities. DT Midstream's Pipeline segment also includes joint venture interests in equity method investees which own and operate interstate pipelines that connect to DT Midstream’s wholly owned assets.

DT Midstream’s core assets strategically connect key demand centers in the Midwestern U.S., Eastern Canada and Northeastern U.S. regions to the premium production areas of the Marcellus/Utica natural gas formation in the Appalachian Basin, and connect key demand centers and LNG export terminals in the Gulf Coast region to premium production areas of the Haynesville natural gas formation.

Basis of Presentation

The DT Midstream Consolidated Financial Statements and Notes to Consolidated Financial Statements are prepared under GAAP. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from DT Midstream’s estimates. DT Midstream believes the assumptions underlying these financial statements are reasonable. Certain prior-period amounts have been reclassified to conform to current-year presentation.

In DT Midstream's opinion, the accompanying unaudited Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, necessary to present a fair statement of our financial position as of September 30, 2023, results of operations for the three and nine months ended September 30, 2023 and 2022, statement of changes in stockholders' equity for the three and nine months ended September 30, 2023 and 2022, and cash flows for the nine months ended September 30, 2023 and 2022. The balance sheet as of December 31, 2022 was derived from audited annual financial statements but does not include all disclosures required by GAAP. Financial results for this interim period are not necessarily indicative of results that may be expected for any other interim period or for the year ending December 31, 2023. The Consolidated Financial Statements should be read in conjunction with DT Midstream's Consolidated Financial Statements and Notes to Consolidated Financial Statements included in DT Midstream's 2022 Annual Report on Form 10-K.

Principles of Consolidation

DT Midstream consolidates all majority-owned subsidiaries and investments in entities in which we have a controlling influence. Non-controlled investments are accounted for using the equity method of accounting when DT Midstream is able to significantly influence the operating policies of the investee. When DT Midstream does not influence the operating policies of an investee, the equity investment is measured at fair value, if readily determinable, or if not readily determinable, at cost less impairment, if applicable. DT Midstream eliminates all intercompany balances and transactions.

DT Midstream evaluates whether an entity is a VIE whenever reconsideration events occur. DT Midstream consolidates VIEs for which we are the primary beneficiary. If DT Midstream is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, DT Midstream considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. DT Midstream performs ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed.

DT Midstream owns an 85% interest in the Stonewall Gas Gathering VIE and is the primary beneficiary, therefore Stonewall Gas Gathering is consolidated. DT Midstream owns a 50% interest in the South Romeo VIE and is the primary beneficiary, therefore South Romeo is consolidated.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

The following table summarizes the major line items in the Consolidated Statements of Financial Position for consolidated VIEs as of September 30, 2023 and December 31, 2022. All assets and liabilities of a consolidated VIE are presented where it has been determined that a consolidated VIE has either (1) assets that can be used only to settle obligations of the VIE or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary. The assets and liabilities of consolidated VIEs that meet the definition of a business and whose assets can be used for purposes other than the settlement of the VIEs' obligations have been excluded from the table below.

Amounts for consolidated VIEs are as follows:


	September 30,		December 31,

	2023		2022
	(millions)
ASSETS (a)
Cash	$	11	$	27
Accounts receivable	8		9
Other current assets	1		3
Intangible assets, net	487		498
Property, plant and equipment, net	394		403
Goodwill	25		25
	$	926	$	965

LIABILITIES (a)
Accounts payable and other current liabilities	$	2	$	4
Other noncurrent liabilities	4		4
	$	6	$	8

_____________________________________

(a)Amounts shown are 100% of the consolidated VIEs' assets and liabilities.

Related Parties

Transactions between DT Midstream and our equity method investees have been presented as related party transactions in the accompanying Consolidated Financial Statements.

Equity Method Investments

Non-controlled investments are accounted for using the equity method of accounting when DT Midstream is able to significantly influence the operating policies of the investee. Under the equity method of accounting, investments are recorded at historical cost as an asset and adjusted for capital contributions, dividends and distributions received, and the Company's share of the investee's earnings or losses, which are recorded as earnings from equity method investees on the Consolidated Statements of Operations. DT Midstream's equity method investments are periodically evaluated for certain factors that may be indicative of other-than-temporary impairment. As of September 30, 2023 and December 31, 2022, DT Midstream’s carrying amounts of investments in equity method investees exceeded our share of the underlying equity in the net assets of the investees by $356 million and $368 million, respectively. The difference will be amortized over the life of the underlying assets. As of September 30, 2023 and December 31, 2022, DT Midstream's consolidated retained earnings balance includes undistributed earnings from equity method investments of zero and $43 million, respectively. DT Midstream uses the cumulative earnings approach to classify proceeds received from equity method investees as dividends or distributions on the Consolidated Statements of Cash Flows.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

Equity method investees are described below:


	Investments As of				% Owned As of
	September 30,		December 31,		September 30,	December 31,

Equity Method Investee	2023		2022		2023	2022


	(millions)
NEXUS	$	916	$	1,313	50%	50%
Vector	137		135		40%	40%
Millennium	729		752		52.5%	52.5%
Total investments in equity method investees	$	1,782	$	2,200

In May 2023, NEXUS closed on the sale of $750 million of senior unsecured notes with a weighted-average coupon rate of 5.52%. DT Midstream received a distribution from NEXUS of $371 million, net of fees and expenses, which reduced our investment balance. DT Midstream used the proceeds from the distribution to repay borrowings outstanding under our Revolving Credit Facility.

In October 2022, DT Midstream closed on the $552 million purchase of an additional 26.25% ownership interest in Millennium from National Grid. The transaction was financed with cash on hand and available capacity under the Company's Revolving Credit Facility. The purchase constituted National Grid's full ownership interests in Millennium and brought DT Midstream's total ownership interest in Millennium to 52.5%. DT Midstream accounts for our ownership interest in Millennium under the equity method of accounting. Millennium is not a VIE and DT Midstream does not have a controlling interest due to shared control with our partner over all of Millennium's significant business activities. DT Midstream’s carrying amount of our Millennium investment exceeded our share of the underlying equity in the net assets of Millennium by $343 million on the acquisition date.

The following table presents summarized financial information of DT Midstream's non-consolidated equity method investees. The amounts included below represent 100% of the results of continuing operations of such entities, including the portion owned by other parties.

Summarized income statement data is as follows:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Operating revenues	$	201	$	194	$	611	$	583
Operating expenses	94		94		282		282
Net Income	$	91	$	93	$	292	$	277

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 2 — SIGNIFICANT ACCOUNTING POLICIES

Cash and Cash Equivalents

Cash and cash equivalents include cash in banks and highly liquid money market investments with remaining maturities of three months or less, when purchased. Cash equivalents are stated at cost, which approximates fair value.

Financing Receivables

Financing receivables are primarily composed of trade accounts receivable and notes receivable, which are stated at net realizable value. DT Midstream regularly monitors the credit quality of our financing receivables by reviewing counterparty credit quality indicators and monitoring for triggering events, such as a credit rating downgrade or bankruptcy. DT Midstream has three internal grades of credit quality, with internal grade 1 as the lowest risk and internal grade 3 as the highest risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through September 30, 2023. As of September 30, 2023, the Notes receivable — related party of $4 million, which originated prior to 2021, was classified as internal grade 1. There are no notes receivable on nonaccrual status and no past due financing receivables as of September 30, 2023.

For trade accounts receivable, the customer allowance for expected credit loss is calculated based on specific review of future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, historical loss rates, customer trends and other relevant factors that may affect our ability to collect are also considered. Receivables are written off on a specific identification basis and determined based on the particular circumstances of the associated receivable. Uncollectible expense (recovery) was zero for the three and nine months ended September 30, 2023 and 2022.

Our collections on accounts receivable from customers are current, and no material rate of historical loss was noted, which resulted in no allowance for expected credit loss as of September 30, 2023 or December 31, 2022. Any balance would be shown as a deduction from the respective financing receivable's balance in the Consolidated Statements of Financial Position.

Operation and Maintenance

Operation and maintenance is primarily comprised of costs for labor and employee benefits, outside services, materials, compression, purchased natural gas, operating lease costs, office costs, and other operating and maintenance costs.

NOTE 3 — GOODWILL

DT Midstream has goodwill that resulted from business combinations. The carrying value of goodwill is evaluated for impairment on an annual basis or whenever events or circumstances indicate that the value of goodwill may be impaired. We performed our prior year annual impairment test as of October 1, 2022 and determined that the estimated fair value of each reporting unit exceeded its carrying value, and no impairment existed. No additions, impairments or other changes occurred during the three and nine months ended September 30, 2023.

The following is the summary of the carrying value of goodwill:



	September 30,		December 31,
	2023		2022
	(millions)


Pipeline	$	53	$	53
Gathering	420		420
Total goodwill	$	473	$	473

While we believe the estimates and assumptions in the fair value are reasonable, the actual results may differ from projections. To the extent projected results or cash flows are revised downward, the reporting unit may be required to write down all or a portion of its goodwill, which would adversely impact our earnings. If current expectations of future long-term growth are not met or market factors outside of our control change, such as U.S. Treasury Rates or declines in midstream industry transaction multiples, this may lead to a goodwill impairment in the future.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 4 — REVENUE

Disaggregation of Revenue

The following is a summary of revenues disaggregated by segment:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Pipeline (a)	$	96	$	87	$	271	$	247
Gathering	138		148		407		430

Total operating revenues	$	234	$	235	$	678	$	677

__________________________________

(a)Includes revenues outside the scope of Topic 606 primarily related to contracts accounted for as leases of $2 million and $3 million for the three months ended September 30, 2023 and 2022, respectively, and $5 million and $7 million for the nine months ended September 30, 2023 and 2022, respectively.

Nature of Services

DT Midstream primarily provides two types of revenue services: firm service and interruptible service. Firm service revenue contracts provide for fixed revenue commitments regardless of actual volumes of natural gas that flow, which leads to more stable operating performance, revenues and cash flows and limits our exposure to natural gas price fluctuations. Firm service revenue contracts are typically long-term and structured using fixed demand charges or MVCs with fixed deficiency fee rates. Contracts structured using fixed demand charges contain a performance obligation of a stand-ready series of distinct services that are substantially the same with the same pattern of transfer to the customer, therefore revenue is recognized ratably over time. Contracts structured using MVCs with fixed deficiency fee rates require customers to transport or store a minimum volume of natural gas over a specified time period. If a customer fails to meet its MVCs for the specified time period, the contract consideration includes a fixed rate for the actual volumes transported, gathered or stored, and a deficiency fee for the shortfall between the MVCs and the actual volumes transported, gathered or stored. If a customer exceeds its MVC for the specified time period, the contract consideration is based on fixed rates for the actual volumes transported, gathered or stored. The contract consideration is allocated to each distinct monthly performance obligation, consistent with the allocation objective and based upon the level of effort required to satisfy the service obligation. Revenues are generally recognized over time based on the output measure of natural gas volumes transported, gathered or stored, with the recognition of the deficiency fee revenue in the period when it is known the customer cannot make up the deficient volumes in the specified time period. Interruptible service revenue contracts typically contain fixed rates, with total consideration dependent on actual natural gas volumes that flow. Interruptible service revenues are recognized over time based on the output measure of natural gas volumes transported, gathered or stored. Certain of our gathering contracts allow for the recovery of production-related operating expenses, which are recorded as revenue and operating expense.

Contract Liabilities

The following is a summary of contract liability activity:


	2023
	(millions)
Balance as of January 1	$	32
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period	62
Revenue recognized that was included in the balance at the beginning of the period	(3)

Balance as of September 30	$	91

The contract liabilities at DT Midstream generally represent amounts paid by or receivable from customers for which the associated performance obligation has not yet been satisfied. Contract liabilities associated with these services are recognized upon delivery of the service to the customer.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

The following table presents contract liability amounts as of September 30, 2023 that are expected to be recognized as revenue in future periods:


	(millions)
Remainder of 2023	$	3
2024	13
2025	13
2026	13
2027	13
2028 and thereafter	36
Total	$	91

Transaction Price Allocated to the Remaining Performance Obligations

In accordance with optional exemptions available under Topic 606, DT Midstream does not disclose the value of unsatisfied performance obligations for (1) contracts with an original expected length of one year or less, (2) with the exception of fixed consideration, contracts for which the amount of revenue recognized depends upon DT Midstream's invoices for actual volumes transported, gathered or stored, and (3) contracts for which variable consideration relates entirely to an unsatisfied performance obligation.

Such contracts consist of various types of performance obligations, including providing midstream services. Contracts with variable volumes and/or variable pricing, including those with pricing provisions tied to a consumer price or other index, have also been excluded as the related contract consideration is variable at the contract inception. Contract lengths vary from cancellable to multi-year.

The following table presents revenue amounts related to fixed consideration associated with unsatisfied performance obligations as of September 30, 2023 that are expected to be recognized as revenue in future periods:


	(millions)
Remainder of 2023	$	27
2024	129
2025	133
2026	103
2027	71
2028 and thereafter	247
Total	$	710

Costs to Obtain or Fulfill a Contract

DT Midstream recognizes an asset from the costs incurred to obtain a revenue contract only if it expects to recover those costs. In addition, the costs to fulfill a revenue contract are capitalized if the costs are specifically identifiable to a revenue contract, would result in enhancing resources that will be used in satisfying performance obligations in the future, and are expected to be recovered. These capitalized costs are amortized on a systematic basis consistent with the pattern of transfer of the services to which such costs relate.

As of September 30, 2023 and December 31, 2022, the Company had capitalized costs to obtain or fulfill a contract of $18 million and $19 million, respectively, which are included in other current assets and other noncurrent assets in the accompanying Consolidated Statements of Financial Position. During the three and nine months ended September 30, 2023 and 2022, we recognized approximately $1 million of amortization expense related to such capitalized costs.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 5 — EARNINGS PER SHARE AND DIVIDENDS

Basic earnings per share is calculated by dividing Net Income attributable to DT Midstream by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflect the dilution that would occur if any potentially dilutive instruments were exercised or converted into common shares. Restricted stock units and performance shares, including dividend equivalents on those grants, are potentially dilutive and, if dilutive, are included in the determination of weighted average shares outstanding. Restricted stock units and performance shares do not receive cash dividends, as such, these awards are not considered participating securities.

The following is a reconciliation of DT Midstream's basic and diluted earnings per share calculation:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	91	$	113	$	263	$	285
Average number of common shares outstanding — basic	97.0		96.7		96.9		96.7

Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.5		0.3		0.5		0.3
Average number of common shares outstanding — diluted	97.5		97.0		97.4		97.0

Basic Earnings per Common Share	$	0.94	$	1.17	$	2.72	$	2.94
Diluted Earnings per Common Share	$	0.94	$	1.16	$	2.70	$	2.94

DT Midstream declared the following cash dividends:


Dividends Declared	Dividend Amount				Dividend Payment Date
(quarter ended)	(per-share)		(millions)



2022
March 31	$	0.64	$	62	April 2022
June 30	$	0.64	$	62	July 2022
September 30	$	0.64	$	62	October 2022
December 31	$	0.64	$	62	January 2023
2023
March 31	$	0.69	$	67	April 2023
June 30	$	0.69	$	67	July 2023
September 30	$	0.69	$	67	October 2023

NOTE 6 — INCOME TAXES

Effective Tax Rates

DT Midstream records income taxes during the interim period using an estimated annual effective tax rate (ETR) and recognizes specific events discretely as they occur.

The interim period ETRs of DT Midstream are 26% and 6% for the three months ended September 30, 2023 and 2022, respectively, and 27% and 18% for the nine months ended September 30, 2023 and 2022, respectively. The difference between the interim period ETRs and federal statutory rate of 21% is primarily related to state income taxes. The changes in the ETRs for the comparative periods is primarily driven by the remeasurement of state deferred taxes due to state tax rate changes enacted in 2022.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 7 — FAIR VALUE

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable inputs. DT Midstream makes certain assumptions it believes that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. DT Midstream believes it uses valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs.

A fair value hierarchy has been established that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. DT Midstream classifies fair value balances based on the fair value hierarchy defined as follows:

•Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that DT Midstream has the ability to access as of the reporting date.

•Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the assets or liabilities or indirectly observable through corroboration with observable market data.

•Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.

Fair Value of Financial Instruments

The following table presents the carrying amount and fair value of financial instruments:


	September 30, 2023								December 31, 2022
	Carrying		Fair Value						Carrying		Fair Value
	Amount		Level 1		Level 2		Level 3		Amount		Level 1		Level 2		Level 3
	(millions)
Cash equivalents (a)	$	13	$	—	$	13	$	—	$	—	$	—	$	—	$	—
Long-term notes receivable — related party	4		—		—		4		4		—		—		4
Short-term borrowings (a)	125		—		125		—		330		—		330		—
Long-term debt (b)	$	3,064	$	—	$	2,693	$	—	$	3,059	$	—	$	2,701	$	—

______________________________________

(a)Short-term borrowings and money market cash equivalents are stated at cost, which approximates fair value.

(b)Carrying value represents principal of $3,099 million, net of unamortized debt discounts and issuance costs.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 8 — DEBT

Long-Term Debt

DT Midstream's long-term debt outstanding included:


			Maturity	September 30,		December 31,
Title	Type	Interest Rate	Date (d)	2023		2022
				(millions)
2029 Notes	Senior Notes (a)	4.125%	2029	$	1,100	$	1,100
2031 Notes	Senior Notes (a)	4.375%	2031	1,000		1,000
2032 Notes	Senior Secured Notes (b)	4.300%	2032	600		600
Term Loan Facility	Term Loan Facility	Variable (c)	2028	399		399
Long-term debt principal				3,099		3,099
Unamortized debt discount				(2)		(3)
Unamortized debt issuance costs				(33)		(37)

Long-term debt				$	3,064	$	3,059

______________________________

(a) Interest payable semi-annually in arrears each June 15 and December 15.

(b) Interest payable semi-annually in arrears each April 15 and October 15.

(d) DT Midstream does not have any scheduled debt maturities until 2028.

Short-Term Credit Arrangements and Borrowings

The following table presents the availability under the Revolving Credit Facility:


	September 30,
	2023
	(millions)
Total availability
Revolving Credit Facility, expiring October 2027	$	1,000
Amounts outstanding
Revolving Credit Facility borrowings	125
Letters of credit	16
	141
Net availability	$	859

Borrowings under the Revolving Credit Facility are used for general corporate purposes, acquisitions, and letter of credit issuances to support DT Midstream's operations and liquidity. In April 2023, certain letters of credit totaling $23 million were replaced with surety bonds. See Note 9, "Commitments and Contingencies" for additional information. Revolving Credit Facility related issuance and amendment costs, net of amortization, were $7 million and $8 million as of September 30, 2023 and December 31, 2022, respectively. These costs are included in Other noncurrent assets on DT Midstream's Consolidated Statements of Financial Position and are being amortized over the remaining term of the Revolving Credit Facility.

In June 2023, DT Midstream entered into an Amendment No. 2 to our Credit Agreement amending certain of the terms, including, among other things, the replacement of the interest rate provisions related to the Term Loan Facility from Eurodollar Rate to Term SOFR (as defined in the Credit Agreement).

The Credit Agreement covering the Term Loan Facility and Revolving Credit Facility includes financial covenants that DT Midstream must maintain. These covenants restrict the ability of DT Midstream and our subsidiaries to incur additional indebtedness and guarantee indebtedness, create or incur liens, engage in mergers, consolidations, liquidations or dissolutions, sell, transfer or otherwise dispose of assets, make investments, acquisitions, loans or advances, pay dividends and distributions or repurchase capital stock, prepay, redeem or repurchase certain junior indebtedness, enter into agreements that limit the ability of the restricted subsidiaries to make distributions to DT Midstream or the ability of DT Midstream and our restricted subsidiaries to incur liens on assets and enter into certain transactions with affiliates.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

The Term Loan Facility requires the maintenance of a minimum debt service coverage ratio of 1.1 to 1, and the Revolving Credit Facility requires maintenance of (i) a maximum consolidated net leverage ratio of 5 to 1, and (ii) a minimum interest coverage ratio of no less than 2.5 to 1. The debt service coverage ratio means the ratio of annual consolidated EBITDA to debt service, as defined in the Credit Agreement. The consolidated net leverage ratio means the ratio of net debt determined in accordance with GAAP to annual consolidated EBITDA. The interest coverage ratio means the ratio of annual consolidated EBITDA to annual interest expense, as defined in the Credit Agreement. The Credit Agreement definition of annual consolidated EBITDA excludes EBITDA from equity method investees, but includes dividends and distributions from equity method investees. As of September 30, 2023, the debt service coverage ratio, the consolidated net leverage ratio and the interest coverage ratio was 8.3 to 1, 2.4 to 1 and 7.8 to 1, respectively, and DT Midstream was in compliance with these financial covenants.

NOTE 9 — COMMITMENTS AND CONTINGENCIES

From time to time, DT Midstream is subject to legal, administrative and environmental proceedings before various courts, arbitration panels and governmental agencies concerning claims arising in the ordinary course of business. These proceedings include certain contract disputes, additional environmental reviews and investigations, audits and pending judicial matters. DT Midstream cannot predict the final disposition of such proceedings. DT Midstream regularly reviews legal matters and records provisions for claims that we can estimate and are considered probable of loss. The amount or range of reasonably possible losses is not anticipated to, either individually or in the aggregate, materially adversely affect DT Midstream’s business, financial condition and results of operations.

Guarantees

In certain limited circumstances, DT Midstream enters into contractual guarantees. DT Midstream may guarantee another entity's obligation in the event it fails to perform and may provide guarantees in certain indemnification agreements. DT Midstream did not have any guarantees of other parties' obligations as of September 30, 2023.

Surety Bonds

In certain limited circumstances, DT Midstream enters into contracts that require us to obtain external surety bonds to secure our payment and performance. DT Midstream agrees to indemnify the issuers of these surety bonds for amounts, if any, paid by them under these agreements. In the event that any surety bonds are called for non-performance, DT Midstream would be obligated to reimburse the issuer of the surety bond. The maximum potential indemnification under our surety bond agreements as of September 30, 2023 is $32 million.

Vector Line of Credit

DT Midstream is the lender under a revolving term credit facility to Vector, the borrower, in the amount of Canadian $70 million. The credit facility was executed in response to the passage of Canadian regulations requiring oil and gas pipelines to demonstrate their financial ability to respond to a catastrophic event and exists for the sole purpose of satisfying these regulations. Vector may only draw upon the facility if the funds are required to respond to a catastrophic event. The maximum potential payout as of September 30, 2023 is USD $52 million. The funding of a loan under the terms of the credit facility is considered remote.

Environmental Contingencies

In order to comply with certain state environmental regulations, DT Midstream has an obligation to restore pipeline right-of-way slope failures that may arise in the ordinary course of business in the Utica and Marcellus formations. DT Midstream conducted an evaluation, which was prioritized based on the severity and proximity of remaining locations, and used updated cost information to assess the adequacy of the estimate for the contingent liability accrual. Based on this evaluation, we recorded a reduction to the contingent liability accrual and decrease to operation and maintenance expense of $6 million during the three months ended September 30, 2023. As of September 30, 2023 and December 31, 2022, DT Midstream had accrued contingent liabilities of $13 million and $19 million, respectively, for future slope restoration expenditures. The accrual is included in Other current liabilities and Other liabilities in the Consolidated Statements of Financial Position. While restoration and continued evaluation is ongoing, DT Midstream believes the accrued amounts are sufficient to cover estimated future expenditures.

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 10 — SEGMENT AND RELATED INFORMATION

DT Midstream sets strategic goals, allocates resources, and evaluates performance based on the following structure:

The Pipeline segment owns and operates interstate and intrastate natural gas pipelines, storage systems, and natural gas gathering lateral pipelines. The segment also has interests in equity method investees that own and operate interstate natural gas pipelines. The Pipeline segment is also engaged in the transportation and storage of natural gas for intermediate and end user customers. During the three months ended March 31, 2023, DT Midstream completed the conversion of the Michigan System and began providing services under a new long-term dry gas transmission contract. During the three and nine months ended September 30, 2023, the Michigan System financial results are presented in the Pipeline segment. The prior year's comparative activity was for gathering services and therefore was not revised.

The Gathering segment owns and operates gas gathering systems. The segment is engaged in collecting natural gas from points at or near customers’ wells for delivery to plants for treating, to gathering pipelines for further gathering, or to pipelines for transportation, as well as associated ancillary services, including compression, dehydration, gas treatment, water impoundment, water transportation, water disposal, and sand mining.

Inter-segment billing for goods and services exchanged between segments is based upon contracted prices of the provider. Inter-segment billings were not significant for the three and nine months ended September 30, 2023 and 2022.

The following table presents financial data by business segment:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Operating Revenues
Pipeline	$	96	$	87	$	271	$	247
Gathering	138		148		407		430
Total	$	234	$	235	$	678	$	677


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	70	$	185	$	170
Gathering	27		43		78		115
Total	$	91	$	113	$	263	$	285

NOTE 11 — SUBSEQUENT EVENT

Dividend Declaration

On November 1, 2023, DT Midstream announced that our Board of Directors declared a quarterly dividend of $0.69 per share of common stock. The dividend is payable to our stockholders of record as of December 18, 2023 and is expected to be paid on January 15, 2024.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion of our results of operations and financial condition should be read in conjunction with our unaudited Consolidated Financial Statements and the Notes to Consolidated Financial Statements, which are included under Part I, Item 1 of this quarterly report, and the historical consolidated financial statements and notes thereto, which are included in the DT Midstream 2022 Annual Report on Form 10-K. This discussion contains forward-looking statements that involve risks and uncertainties. The forward-looking statements are not historical facts, but rather are based on current expectations, estimates, assumptions and projections about the midstream industry and our business and financial results. Our actual results could differ materially from the results contemplated by these forward-looking statements due to a number of factors, including those discussed in the sections entitled "Forward-Looking Statements" and "Risk Factors."

OVERVIEW

Our Business

We are an owner, operator, and developer of an integrated portfolio of natural gas midstream assets. We provide multiple, integrated natural gas services to customers through our Pipeline segment, which includes interstate pipelines, intrastate pipelines, storage systems, and lateral pipelines, and through our Gathering segment. We also own joint venture interests in equity method investees which own and operate interstate pipelines that connect to our wholly owned assets.

Our core assets strategically connect key demand centers in the Midwestern U.S., Eastern Canada and Northeastern U.S. regions to the premium production areas of the Marcellus/Utica natural gas formation in the Appalachian Basin, and connect key demand centers and LNG export terminals in the Gulf Coast region to premium production areas of the Haynesville natural gas formation.

We have an established history of stable, long-term growth with contractual cash flows from customers that include natural gas producers, local distribution companies, electric power generators, industrials, and national marketers.

STRATEGY

Our principal business objective is to safely and reliably operate and develop natural gas assets across our premier footprint. Our proven leadership and highly engaged employees have an excellent track record. Prospectively, we intend to continue this track record by executing on our natural gas-centric business strategy focused on disciplined capital deployment and supported by a flexible, well capitalized balance sheet. Additionally, we intend to develop low carbon business opportunities and deploy greenhouse gas reducing technologies as part of our goal of being leading environmental stewards in the midstream industry. We are executing on a plan to achieve net zero carbon emissions by 2050. Our strategy is premised on the following principles:

•operate our assets in a sustainable and responsible manner;

•disciplined capital deployment in assets supported by strong fundamentals;

•capitalize on asset integration and utilization opportunities;

•pursue economically attractive opportunities;

•grow cash flows supported by long-term firm revenue contracts; and

•provide exceptional service to our customers.

RESULTS OF OPERATIONS

Management’s Discussion and Analysis of Financial Condition and Results of Operations includes financial information prepared in accordance with GAAP. The following sections discuss the operating performance and future outlook of our segments. Segment information includes intercompany revenues and expenses, as well as other income and deductions that are eliminated in the Consolidated Financial Statements.

For purposes of the following discussion, any increases or decreases refer to the comparison of the three months ended September 30, 2023 to the three months ended June 30, 2023, and the nine months ended September 30, 2023 to the nine months ended September 30, 2022, as applicable.

The following table summarizes our consolidated financial results:


	Three Months Ended				Nine Months Ended
	September 30,		June 30,			September 30,		September 30,
	2023		2023			2023		2022
	(millions, except per share amounts)
Operating revenues	$	234	$	224		$	678	$	677
Net Income Attributable to DT Midstream	91		91			263		285
Diluted Earnings per Common Share	$	0.94	$	0.93		$	2.70	$	2.94


	Three Months Ended				Nine Months Ended
	September 30,		June 30,			September 30,		September 30,
	2023		2023			2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	64		$	185	$	170
Gathering	27		27			78		115
Total	$	91	$	91		$	263	$	285

Pipeline

The Pipeline segment consists of our interstate pipelines, intrastate pipelines, storage systems, lateral pipelines including related treatment plants and compression and surface facilities. This segment also includes our equity method investments. During the three months ended March 31, 2023, DT Midstream completed the conversion of the Michigan System and began providing services under a new long-term dry gas transmission contract. During the three and nine months ended September 30, 2023, the Michigan System financial results are presented in the Pipeline segment. The prior year's comparative activity was for gathering services and therefore was not revised.

Pipeline results and outlook are discussed below:


	Three Months Ended				Nine Months Ended
	September 30,		June 30,			September 30,		September 30,
	2023		2023			2023		2022
	(millions)
Operating revenues	$	96	$	90		$	271	$	247
Operation and maintenance	13		14			38		37
Depreciation and amortization	17		17			50		46
Taxes other than income	5		3			12		12
Asset (gains) losses and impairments, net	(1)		(3)			(4)		(6)
Operating Income	62		59			175		158
Interest expense	13		13			42		41
Interest income	—		(1)			(1)		(1)
Earnings from equity method investees	(41)		(41)			(132)		(107)
Loss from financing activities	—		—			—		6

Income Tax Expense	23		21			72		40
Net Income	67		67			194		179
Less: Net Income Attributable to Noncontrolling Interests	3		3			9		9
Net Income Attributable to DT Midstream	$	64	$	64		$	185	$	170

Operating revenues increased $6 million for the three months ended September 30, 2023 primarily due to the phase 1 Haynesville System (LEAP) expansion of $5 million. Operating revenues increased $24 million for the nine months ended September 30, 2023 primarily due to higher long-term and short-term storage contracting rates at the Washington 10 Storage Complex of $15 million and new transmission service contracts at the Michigan System of $11 million, partially offset by lower volumes at Bluestone of $2 million.

Operation and maintenance expense increased $1 million for the nine months ended September 30, 2023 primarily due to new transmission service contracts at the Michigan System.

Depreciation and amortization expense increased $4 million for the nine months ended September 30, 2023 primarily due to new transmission service assets at the Michigan System and new Haynesville System (LEAP) assets placed into service.

Interest expense increased $1 million for the nine months ended September 30, 2023 primarily due to higher borrowings under the Revolving Credit Facility, a full nine months of interest expense related to our 2032 Notes, and higher interest rates on the Term Loan Facility. This increase was mostly offset by a lower balance on the Term Loan Facility and higher capitalized interest due to higher construction in progress during 2023.

Earnings from equity method investees increased $25 million for the nine months ended September 30, 2023 primarily due to Millennium of $22 million from our higher ownership percentage, and NEXUS of $2 million driven by increased contract rates and additional customers partially offset by higher interest expense from new senior unsecured notes.

Loss from financing activities decreased $6 million for the nine months ended September 30, 2023 due to the partial repayment of our Term Loan Facility that occurred during the three months ended June 30, 2022.

Income tax expense increased $32 million for the nine months ended September 30, 2023 primarily due to the 2022 decrease in Pennsylvania income tax rates which resulted in a $15 million benefit from remeasuring our deferred tax balances in the prior year and higher income before income taxes in 2023.

Pipeline Outlook

We believe our long-term agreements with customers and the location and connectivity of our pipeline assets position the business for future growth. We will continue to pursue economically attractive expansion opportunities that leverage our current asset footprint and strategic relationships. These growth opportunities include further expansion at the Haynesville System (LEAP) and Stonewall Gas Gathering, new contracts with higher rates at the Washington 10 Storage Complex, and additional growth related to our equity method investments.

Gathering

The Gathering segment includes gathering systems, related treatment plants and compression and surface facilities. Gathering results and outlook are discussed below:


	Three Months Ended				Nine Months Ended
	September 30,		June 30,			September 30,		September 30,
	2023		2023			2023		2022
	(millions)
Operating revenues	$	138	$	134		$	407	$	430
Operation and maintenance	45		46			138		152
Depreciation and amortization	29		27			83		80
Taxes other than income	2		3			10		11
Asset (gains) losses and impairments, net	—		—			—		(17)
Operating Income	62		58			176		204
Interest expense	25		22			69		58
Interest income	—		—			—		(1)
Loss from financing activities	—		—			—		7
Other (income) and expense	—		—			(1)		—
Income Tax Expense	10		9			30		25
Net Income Attributable to DT Midstream	$	27	$	27		$	78	$	115

Operating revenues increased $4 million for the three months ended September 30, 2023 primarily due to higher Blue Union revenues of $4 million driven by recovery of production-related operating expenses. Operating revenues decreased $23 million for the nine months ended September 30, 2023 primarily due to lower Blue Union revenues of $28 million and lower Susquehanna Gathering System volumes of $4 million, partially offset by higher Appalachia Gathering System volumes of $14 million. Lower Blue Union revenues were driven primarily by lower rates and recovery of production-related operating expenses, partially offset by new contracts.

Operation and maintenance expense decreased $1 million for the three months ended September 30, 2023 primarily due to a reduction in Appalachia Gathering System environmental contingent liabilities of $6 million, partially offset by higher Blue Union expenses of $5 million driven by higher production-related operating expenses and planned maintenance. Operation and maintenance expense decreased $14 million for the nine months ended September 30, 2023 primarily due to a reduction in Appalachia Gathering System environmental contingent liabilities of $6 million, lower Blue Union expenses of $5 million driven by lower production-related operating expenses and planned maintenance, and lower Susquehanna Gathering System expenses of $3 million.

Depreciation and amortization expense increased $3 million for the nine months ended September 30, 2023 primarily due to new Blue Union and Appalachia Gathering System assets placed into service.

Asset (gains) losses and impairments, net decreased $17 million for the nine months ended September 30, 2023 primarily due to the 2022 gain on sale of certain assets in the Utica Shale region of $17 million.

Interest expense increased $11 million for the nine months ended September 30, 2023 primarily due to higher borrowings under the Revolving Credit Facility, a full nine months of interest expense related to our 2032 Notes, and higher interest rates on the Term Loan Facility. This increase was partially offset by a lower balance on the Term Loan Facility and higher capitalized interest due to higher construction in progress during 2023.

Loss from financing activities decreased $7 million for the nine months ended September 30, 2023 due to the partial repayment of our Term Loan Facility that occurred during the three months ended June 30, 2022.

Income tax expense increased $5 million for the nine months ended September 30, 2023 primarily due to the 2022 decrease in Pennsylvania income tax rates which resulted in a $10 million benefit from remeasuring our deferred tax balances in the prior year, partially offset by lower income before income taxes.

Gathering Outlook

We believe our long-term agreements with producers and the quality of the natural gas reserves in the Marcellus/Utica and Haynesville formations position the business for future growth. We will continue to pursue economically attractive expansion opportunities that leverage our current asset footprint and strategic relationships. These growth opportunities include further expansion at the Haynesville System (Blue Union), the Appalachia Gathering System, and the Ohio Utica System.

CAPITAL INVESTMENTS

Capital spending within our Company is primarily for ongoing maintenance and expansion of our existing assets, and if identified, attractive growth opportunities. We have been disciplined in our capital deployment and make growth investments that meet our criteria in terms of strategy, management skills, and identified risks and expected returns. All potential investments are analyzed for their rates of return and cash payback on a risk-adjusted basis. Our total capital expenditures, inclusive of $6 million in contributions to equity method investees, were $628 million for the nine months ended September 30, 2023. We anticipate total capital expenditures, inclusive of contributions to equity method investees, in 2023 of approximately $790 million to $850 million.

ENVIRONMENTAL MATTERS

We are subject to extensive U.S. federal, state, and local environmental regulations. Additional compliance costs may result as the effects of various substances on the environment are studied and governmental regulations are developed and implemented. Actual costs to comply with such regulation could vary substantially from our expectations. Pending or future legislation or regulation could have a material impact on our operations and financial position. Potential impacts include unplanned expenditures for environmental equipment, such as pollution control equipment, financing costs related to additional capital expenditures and the replacement costs of aging pipelines and other facilities.

For further discussion of environmental matters, see Note 9, "Commitments and Contingencies" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

CAPITAL RESOURCES AND LIQUIDITY

Cash Requirements

Our principal liquidity requirements are to finance our operations, fund capital expenditures, satisfy our indebtedness obligations, and pay approved dividends. We believe we will have sufficient internal and external capital resources to fund anticipated capital and operating requirements.


	Nine Months Ended
	September 30,
	2023		2022
	(millions)
Cash and Cash Equivalents at Beginning of Period	$	61	$	132
Net cash and cash equivalents from operating activities	614		574
Net cash and cash equivalents from (used for) investing activities	(223)		(150)
Net cash and cash equivalents from (used for) financing activities	(422)		(201)
Net Increase (Decrease) in Cash and Cash Equivalents	(31)		223
Cash and Cash Equivalents at End of Period	$	30	$	355

For purposes of the following discussion, any increases or decreases refer to the comparison of the nine months ended September 30, 2023 to the nine months ended September 30, 2022.

Operating Activities

Cash flows from our operating activities can be impacted in the short term by the natural gas volumes gathered or transported through our systems under interruptible service revenue contracts, natural gas price changes, seasonality, weather fluctuations, dividends received from equity method investees and the financial condition of our customers. Our preference to enter into firm service revenue contracts leads to more stable operating performance, revenues and cash flows and limits our exposure to natural gas price fluctuations.

Net cash and cash equivalents from operating activities increased $40 million in the nine months ended September 30, 2023 primarily due to an increase in dividends received from equity method investees, working capital changes, and an increase in operating income after adjustment for non-cash items including depreciation and amortization expense, stock-based compensation, amortization of operating lease right-of-use assets, and assets (gains) losses and impairments. These increases were partially offset by an increase in interest expense in 2023.

Investing Activities

Cash outflows associated with our investing activities are primarily the result of plant and equipment expenditures, acquisitions, and contributions to equity method investees. Cash inflows from our investing activities are generated from proceeds from sale or collection of notes receivable, distributions received from equity method investees, and proceeds from asset sales.

Net cash and cash equivalents used for investing activities increased $73 million in the nine months ended September 30, 2023 primarily due to an increase in cash used for plant and equipment expenditures for expansions on LEAP, Blue Union, the Appalachia Gathering System, and the Ohio Utica System, and a decrease in proceeds from the sale of notes receivable. This change was partially offset by higher distributions received from equity method investees in 2023, including the NEXUS distribution.

Financing Activities

In April 2022, we issued the 2032 Notes in aggregate principal amount of $600 million. We used the net proceeds from the 2032 Notes of $593 million to partially repay indebtedness under our Term Loan Facility. See Note 8, "Debt" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

DT Midstream paid cash dividends on common stock of $196 million and $182 million during the nine months ended September 30, 2023 and 2022, respectively. See Note 5, "Earnings Per Share and Dividends" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Net cash and cash equivalents used for financing activities increased $221 million in the nine months ended September 30, 2023 primarily due to higher net repayments of borrowings under the Revolving Credit Facility, higher dividends paid on common stock, higher other financing activity payments and lower proceeds from the issuance of long-term debt. The increase was partially offset by lower repayments of long-term debt.

Outlook

We expect to continue executing on our natural gas-centric business strategy focused on disciplined capital deployment and supported by a flexible, well capitalized balance sheet. Other than the impact of the items discussed below on our debt and equity capitalization, we are not aware of any trends, other demands, commitments, events or uncertainties that are reasonably likely to materially impact our liquidity position.

Our working capital requirements will be primarily driven by changes in accounts receivable and accounts payable. We continue our efforts to identify opportunities to improve cash flows through working capital initiatives and obtaining additional long-term firm service revenue contracts from customers.

Our sources of liquidity include cash generated from operating activities and available borrowings under our Revolving Credit Facility. As of September 30, 2023, we had $16 million of letters of credit outstanding and $125 million of borrowings outstanding under our Revolving Credit Facility. We had approximately $889 million of available liquidity as of September 30, 2023, consisting of amounts available under our Revolving Credit Facility and cash and cash equivalents.

We expect to pay regular cash dividends to DT Midstream common stockholders in the future. Any payment of future dividends is subject to approval by the Board of Directors and may depend on our future earnings, cash flows, capital requirements, financial condition, and the effect a dividend payment would have on our compliance with relevant financial covenants. Over the long-term, we expect to grow our dividend consistent with cash flow growth and are targeting a payout ratio consistent with pure-play midstream companies.

We believe we will have sufficient operating flexibility, cash resources and funding sources to maintain adequate amounts of liquidity and to meet future operating cash, capital expenditure and debt servicing requirements. However, virtually all of our businesses are capital intensive, or require access to capital, and the inability to access adequate capital could adversely impact future earnings and cash flows.

See Note 8, "Debt" and Note 9, "Commitments and Contingencies" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

CRITICAL ACCOUNTING ESTIMATES

The preparation of our Consolidated Financial Statements in conformity with GAAP requires that management applies accounting policies and makes estimates and assumptions that affect results of operations and the amounts of assets and liabilities reported in the Consolidated Financial Statements. Management believes that the area described below requires significant judgment in the application of the accounting policy or in making estimates and assumptions in matters that are inherently uncertain and that may change in subsequent periods.

Goodwill

We have goodwill that resulted from business combinations. Annually as of October 1st, an impairment test for goodwill is performed which compares the fair value of each reporting unit to its carrying value including goodwill. In between annual impairment tests, we monitor our estimates and assumptions regarding future cash flows, including the impact of movements in market indicators. An interim impairment test is performed whenever a triggering event occurs or circumstances indicate that the value of goodwill may be impaired.

The estimated fair value in our annual goodwill impairment analysis utilizes significant assumptions that require judgement by management. One such significant assumption is the weighted average cost of capital which is used to discount estimates of projected future results and cash flows to be generated by each reporting unit. We have noted that U.S. Treasury risk-free rates have increased and U.S. Industrial Bond spreads have decreased since our last annual impairment test. Our annual goodwill impairment analysis includes a comparison of the estimated fair value of the Company as a whole to our market capitalization. Management also compares the implied market multiple of the estimated fair value of each reporting unit to midstream industry transaction multiples. We have noted a slight increase in our consolidated market capitalization since our last annual goodwill impairment test. We have noted a slight decrease in gathering-related transaction multiples since our last annual goodwill impairment test. After assessing all relevant facts and circumstances, we have concluded that no triggering event has occurred that indicates it is more likely than not that the goodwill is impaired for either reporting unit and determined that an interim impairment test is not required. We will continue to monitor our estimates and assumptions on a quarterly basis as market conditions continue to evolve.

While we believe the estimates and assumptions in the fair value are reasonable, the actual results may differ from projections. To the extent projected results or cash flows are revised downward, the reporting unit may be required to write down all or a portion of its goodwill, which would adversely impact our earnings. If current expectations of future long-term growth are not met or market factors outside of our control change, such as U.S. Treasury Rates or a decline in midstream industry transaction multiples, this may lead to a goodwill impairment in the future.

See Part I, Item 3, "Quantitative and Qualitative Disclosures About Market Risk", in this Form 10-Q for more information on our exposure to market risk. See also "Critical Accounting Estimates" included in DT Midstream's 2022 Annual Report on Form 10-K.

OFF-BALANCE SHEET ARRANGEMENTS

We are party to off-balance sheet arrangements, which include our equity method investments. See Note 1, "Description of the Business and Basis of Presentation—Principles of Consolidation" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q for further discussion of the nature, purpose and other details of such agreements.

Other off-balance sheet arrangements include the Vector line of credit and our surety bonds, which are discussed further in Note 9, "Commitments and Contingencies" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

NEW ACCOUNTING PRONOUNCEMENTS

There are no new accounting pronouncements that are expected to have a material impact on DT Midstream's consolidated financial statements.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Market Price Risk

Our business is dependent on the continued availability of natural gas production and reserves in our areas of operation. Low prices for natural gas, including those resulting from regional basis differentials, could adversely affect development of additional reserves and future production that is accessible by our pipeline and storage assets. We manage our exposure through the use of short, medium, and long-term transportation, gathering, and storage contracts. Consequently, our existing operations and cash flows have limited direct exposure to natural gas price risk.

Credit Risk

We are exposed to credit risk, which is the risk of loss resulting from nonpayment or nonperformance under a contract. We manage our exposure to credit risk associated with customers through credit analysis, credit approval, credit limits and monitoring procedures. For certain transactions, we may request letters of credit, cash collateral, prepayments or guarantees as forms of credit support. Our FERC tariffs require tariff customers that do not meet specified credit standards to provide three months of credit support, however, we are exposed to credit risk beyond this three-month period when our tariffs do not require our customers to provide additional credit support. For some long-term contracts associated with system expansions, we have entered into negotiated credit agreements that provide for enhanced forms of credit support if certain credit standards are not met.

We depend on a key customer, Southwestern Energy, in the Haynesville formation in the Gulf Coast and in the Utica and Marcellus formations in the Northeastern U.S. for a significant portion of our revenues. The loss of, or reduction in volumes from, this key customer could result in a decline in demand for our services and materially adversely affect our business, financial condition and results of operations.

We engage with customers that are sub-investment grade, including our key customer, Southwestern Energy. These customers are otherwise considered creditworthy or are required to make prepayments or provide security to satisfy credit concerns. We regularly monitor for bankruptcy proceedings that may impact our customers and had no bankruptcy proceedings during the nine months ended September 30, 2023.

Interest Rate Risk

We are subject to interest rate risk in connection with the issuance of debt. Our exposure to interest rate risk arises primarily from changes in SOFR. As of September 30, 2023, we had floating rate debt of $524 million related to the variable rate Term Loan Facility and borrowings outstanding under our Revolving Credit Facility and a floating rate debt-to-total debt ratio of 16%. See Note 8, "Debt" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

We are subject to interest rate risk in connection with our goodwill impairment assessment. See "Critical Accounting Estimates" under Part I, Item 2 of this Form 10-Q.

Summary of Sensitivity Analysis

A sensitivity analysis was performed on the fair values of our long-term debt obligations. The sensitivity analysis involved increasing and decreasing interest rates as of September 30, 2023 by a hypothetical 10% and calculating the resulting change in the fair values. The hypothetical losses related to long-term debt would be realized only if we transferred all of our fixed-rate long-term debt to other creditors. The results of the sensitivity analysis are as follows:

Assuming a 10% Increase in Rates

Assuming a 10% Decrease in Rates

Change in the Fair Value of

Activity

As of September 30, 2023

(millions)

Interest rate risk

(93)

Long-term debt

Item 4. Controls and Procedures

(a) Evaluation of disclosure controls and procedures

Management of DT Midstream carried out an evaluation, under the supervision and with the participation of DT Midstream's Chief Executive Officer (CEO) and Chief Financial Officer (CFO), of the effectiveness of the design and operation of DT Midstream's disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of September 30, 2023, which is the end of the period covered by this report. Based on this evaluation, DT Midstream's CEO and CFO have concluded that such disclosure controls and procedures are effective in providing reasonable assurance that information required to be disclosed by DT Midstream in reports that it files or submits under the Exchange Act (i) is recorded, processed, summarized, and reported within the time periods specified in the SEC's rules and forms and (ii) is accumulated and communicated to DT Midstream's management, including our CEO and CFO, as appropriate to allow timely decisions regarding required disclosure. Due to the inherent limitations in the effectiveness of any disclosure controls and procedures, management cannot provide absolute assurance that the objectives of our disclosure controls and procedures will be attained.

(b) Changes in internal control over financial reporting

There have been no changes in DT Midstream's internal control over financial reporting during the quarter ended September 30, 2023 that have materially affected, or are reasonably likely to materially affect, DT Midstream's internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings

For information on legal proceedings and matters related to DT Midstream, see Note 9, "Commitments and Contingencies" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

Item 1A. Risk Factors

There are various risks associated with the operations of DT Midstream's businesses. To provide a framework to understand the operating environment of DT Midstream, a brief explanation of the more significant risks associated with DT Midstream's businesses is provided in Part I, Item 1A. "Risk Factors" in DT Midstream's 2022 Annual Report on Form 10-K. Although DT Midstream has identified and disclosed key risk factors, others could emerge in the future.

Item 4. Mine Safety Disclosure

Our sand mining facility in Louisiana is subject to regulation by the Federal Mine Safety and Health Administration under the Federal Mine Safety and Health Act of 1977. Information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K is filed as Exhibit 95.1 to this Form 10-Q.

Item 5. Other Information

None.

Item 6. Exhibits


Exhibit Number						Description

						(i) Exhibits incorporated by reference:

3.1						Amended and Restated Certificate of Incorporation of DT Midstream, Inc., effective July 1, 2021 (Exhibit 3.1 to DT Midstream's Form 8-K filed July 1, 2021)

3.2						Amended and Restated Bylaws of DT Midstream, Inc., effective July 1, 2021 (Exhibit 3.2 to DT Midstream's Form 8-K filed July 1, 2021)

4.1						Indenture, dated as of June 9, 2021, among DT Midstream, Inc., the Guarantors and U.S. Bank National Association, as trustee (Exhibit 4.1 to DT Midstream's Form 8-K filed June 10, 2021)

4.2						Indenture, dated as of April 11, 2022, among DT Midstream, Inc., the Guarantors and U.S. Bank Trust Company, National Association, as trustee (Exhibit 4.1 to DT Midstream's Form 8-K filed April 11, 2022)

4.3						Pari Passu Intercreditor Agreement, dated as of April 11, 2022, among DT Midstream, Inc., the Guarantors, Barclays Bank PLC, as Credit Agreement Agent, and U.S. Bank Trust Company, National Association, as Notes Collateral Agent (Exhibit 4.2 to DT Midstream's Form 8-K filed April 11, 2022)

10.1						First Incremental Revolving Facility Amendment and Amendment No. 1 to Credit Agreement and Collateral Agreement, by and among DT Midstream, Inc., the lenders and letter of credit issuers party thereto and Barclays Bank PLC, as administrative agent and collateral agent, dated as of October 19, 2022 (Exhibit 10.1 to DT Midstream's Current Report on Form 8-K filed on October 20, 2022)

10.2						Amendment No. 2 to Credit Agreement, by and between DT Midstream, Inc., and Barclay's Bank PLC, as administrative agent and collateral agent, dated as of June 27, 2023 (Exhibit 10.1 to DT Midstream's Current Report on Form 8-K filed on June 29, 2023)

						(ii) Exhibits filed herewith:

31.1						Chief Executive Officer Section 302 Form 10-Q Certification of Periodic Report

31.2						Chief Financial Officer Section 302 Form 10-Q Certification of Periodic Report

95.1						Mine Safety Disclosure

101.INS						XBRL Instance Document - The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

101.SCH						XBRL Taxonomy Extension Schema

101.CAL						XBRL Taxonomy Extension Calculation Linkbase

101.DEF						XBRL Taxonomy Extension Definition Database

101.LAB						XBRL Taxonomy Extension Label Linkbase

101.PRE						XBRL Taxonomy Extension Presentation Linkbase

104						Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

						(iii) Exhibits furnished herewith:

32.1						Chief Executive Officer Section 906 Form 10-Q Certification of Periodic Report

32.2						Chief Financial Officer Section 906 Form 10-Q Certification of Periodic Report

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized.


Date:	November 1, 2023
			DT MIDSTREAM, INC.

		By:	/S/ JEFFREY A. JEWELL
			Jeffrey A. Jewell Chief Financial and Accounting Officer
			(Duly Authorized Officer)

Exhibit 31.1

FORM 10-Q CERTIFICATION

I, David Slater, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of DT Midstream, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.


/S/ DAVID J. SLATER	Date:	November 1, 2023
David J. Slater President and Chief Executive Officer of DT Midstream, Inc.

Exhibit 31.2

FORM 10-Q CERTIFICATION

I, Jeffrey Jewell, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of DT Midstream, Inc.;

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.


/S/ JEFFREY A. JEWELL	Date:	November 1, 2023
Jeffrey A. Jewell Chief Financial Officer of DT Midstream, Inc.

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of DT Midstream, Inc. (the “Company”) for the quarter ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David J. Slater, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge and belief:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


Date:	November 1, 2023	/S/ DAVID J. SLATER
		David J. Slater President and Chief Executive Officer of DT Midstream, Inc.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of DT Midstream, Inc. (the “Company”) for the quarter ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jeffrey A. Jewell, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge and belief:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


Date:	November 1, 2023	/S/ JEFFREY A. JEWELL
		Jeffrey A. Jewell Chief Financial Officer of DT Midstream, Inc.

EXHIBIT 95.1

Mine Safety Disclosure

The following disclosure is provided pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health Act of 1977 (“Mine Act”).

The table that follows reflects citations, orders, violations and proposed assessments issued by the Mine Safety and Health Administration (the “MSHA”) to DTM Louisiana Gathering, LLC, an indirect wholly owned subsidiary of DT Midstream, Inc. The disclosure is with respect to the three months ended September 30, 2023. Due to timing and other factors, the data may not agree with the mine data retrieval system maintained by the MSHA at www.MSHA.gov.

DT Midstream, Inc.

Mine Safety Disclosure

For the Three Months Ended September 30, 2023

(Unaudited)

Operation (1)

Section
104
S&S
Citations

Section
104(b)
Orders

Section
104(d)
Citations
and
Orders

Section
110(b)(2)
Violations

Section
107(a)
Orders

Total Dollar

Value of

Proposed

MSHA

Assessments (2)

Total Number of Mining Related
Fatalities

Received Notice of Pattern of Violations Under Section 104(e)

Received Notice of Potential to Have Pattern Under Section 104(e)

Legal
Actions
Pending
as of the
Last Day of
Period

Legal
Actions
Initiated
During
Period

Legal Actions
Resolved
During
Period

DTM GEN6 Proppants, LLC
ID: 1601585

—

Total

—

(1) The definition of mine under section 3 of the Mine Act includes the mine, as well as other items used in, or to be used in, or resulting from, the work of extracting minerals, such as land, structures, facilities, equipment, machines, tools, and preparation facilities. Unless otherwise indicated, any of these other items associated with a single mine have been aggregated in the totals for that mine.

(2) The whole-dollar amounts included are the total dollar value of all proposed or outstanding assessments, regardless of classification, received from the MSHA on or before September 30, 2023 regardless of whether the assessment has been challenged or appealed, for alleged violations occurring during the three months ended September 30, 2023. Citations and orders can be contested and appealed, and as part of that process, are sometimes reduced in severity and amount, and are sometimes dismissed. The number of citations, orders, and proposed assessments vary by inspector and also vary depending on the size and type of the operation.

Cover	9 Months Ended
Cover	Sep. 30, 2023 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-40392
Entity Registrant Name	DT Midstream, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-2663964
Entity Address, Address Line One	500 Woodward Ave., Suite 2900
Entity Address, City or Town	Detroit
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48226-1279
City Area Code	313
Local Phone Number	402-8532
Title of 12(b) Security	Common stock, par value $0.01
Trading Symbol	DTM
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	96,971,021
Entity Central Index Key	0001842022
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Operating revenues	$ 234	$ 235	$ 678	$ 677
Operating Expenses
Operation and maintenance	58	65	176	189
Depreciation and amortization	46	42	133	126
Taxes other than income	7	7	22	23
Asset (gains) losses and impairments, net	(1)	0	(4)	(23)
Operating Income	124	121	351	362
Other (Income) and Deductions
Interest expense	38	35	111	99
Interest income	0	(1)	(1)	(2)
Earnings from equity method investees	(41)	(36)	(132)	(107)
Loss from financing activities	0	0	0	13
Other (income) and expense	0	0	(1)	0
Income Before Income Taxes	127	123	374	359
Income Tax Expense	33	7	102	65
Net Income	94	116	272	294
Less: Net Income Attributable to Noncontrolling Interests	3	3	9	9
Net Income Attributable to DT Midstream	$ 91	$ 113	$ 263	$ 285
Basic Earnings per Common Share
Net Income Attributable to DT Midstream (in dollars per share)	$ 0.94	$ 1.17	$ 2.72	$ 2.94
Diluted Earnings per Common Share
Net Income Attributable to DT Midstream (in dollars per share)	$ 0.94	$ 1.16	$ 2.70	$ 2.94
Weighted Average Common Shares Outstanding
Basic (in shares)	97.0	96.7	96.9	96.7
Diluted (in shares)	97.5	97.0	97.4	97.0

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 94	$ 116	$ 272	$ 294
Foreign currency translation and unrealized gain on derivatives, net of tax	0	1	1	2
Other comprehensive income	0	1	1	2
Comprehensive income	94	117	273	296
Less: Comprehensive income attributable to noncontrolling interests	3	3	9	9
Comprehensive Income Attributable to DT Midstream	$ 91	$ 114	$ 264	$ 287

Consolidated Statements of Financial Position - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 30	$ 61
Accounts receivable (net of $— allowance for expected credit loss for each period end)	146	161
Deferred property taxes	6	22
Prepaid expenses and other	18	18
Total Current Assets	200	262
Investments
Investments in equity method investees	1,782	2,200
Property
Property, plant, and equipment	5,162	4,534
Accumulated depreciation	(814)	(728)
Net Property, plant, and equipment	4,348	3,806
Other Assets
Goodwill	473	473
Long-term notes receivable — related party	4	4
Operating lease right-of-use assets	42	31
Intangible assets, net	1,982	2,025
Other	31	32
Total Other Assets	2,532	2,565
Total Assets	8,862	8,833
Current Liabilities
Accounts payable	124	119
Short-term borrowings	125	330
Operating lease liabilities	15	16
Dividends payable	67	62
Interest payable	39	10
Property taxes payable	17	29
Accrued compensation	13	20
Other	24	28
Total Current Liabilities	424	614
Long-Term Debt	3,064	3,059
Other Liabilities
Deferred income taxes	1,014	923
Operating lease liabilities	30	19
Other	109	64
Total Other Liabilities	1,153	1,006
Total Liabilities	4,641	4,679
Commitments and Contingencies (Note 9)
Stockholders' Equity
Preferred stock ($0.01 par value, 50,000,000 shares authorized, and no shares issued or outstanding as of September 30, 2023 and December 31, 2022)	0	0
Common stock ($0.01 par value, 550,000,000 shares authorized, and 96,971,021 and 96,754,549 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively)	1	1
Additional paid-in capital	3,479	3,469
Retained earnings	608	547
Accumulated other comprehensive income (loss)	(9)	(10)
Total DT Midstream Equity	4,079	4,007
Noncontrolling interests	142	147
Total Equity	4,221	4,154
Total Liabilities and Equity	$ 8,862	$ 8,833

Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Allowance for expected credit loss	$ 0	$ 0
Stockholders' Equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	550,000,000	550,000,000
Common stock, shares issued (in shares)	96,971,021	96,754,549
Common stock, shares outstanding (in shares)	96,971,021	96,754,549

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities
Net Income	$ 272	$ 294
Adjustments to reconcile Net Income to Net cash and cash equivalents from operating activities:
Depreciation and amortization	133	126
Stock-based compensation	15	13
Amortization of operating lease right-of-use assets	14	14
Deferred income taxes	91	51
Earnings from equity method investees	(132)	(107)
Dividends from equity method investees	152	125
Asset (gains) losses and impairments, net	0	(17)
Loss from financing activities	0	13
Changes in assets and liabilities:
Accounts receivable, net	15	19
Accounts payable	(4)	(2)
Interest payable	29	35
Other current and noncurrent assets and liabilities	29	10
Net cash and cash equivalents from operating activities	614	574
Investing Activities
Plant and equipment expenditures	(622)	(173)
Proceeds from sale of notes receivable	0	22
Distributions from equity method investees	405	3
Contributions to equity method investees	(6)	(4)
Notes receivable — third party	0	2
Net cash and cash equivalents from (used for) investing activities	(223)	(150)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	0	591
Repayment of long-term debt	0	(596)
Borrowings under the Revolving Credit Facility	390	0
Repayment of borrowings under the Revolving Credit Facility	(595)	0
Repurchase of common stock	0	(3)
Distributions to noncontrolling interests	(14)	(11)
Dividends paid on common stock	(196)	(182)
Other financing activities	(7)	0
Net cash and cash equivalents from (used for) financing activities	(422)	(201)
Net Increase (Decrease) in Cash and Cash Equivalents	(31)	223
Cash and Cash Equivalents at Beginning of Period	61	132
Cash and Cash Equivalents at End of Period	30	355
Supplemental disclosure of cash information
Interest, net of interest capitalized	76	59
Income taxes	21	9
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable and other accruals	$ 109	$ 60

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Beginning Balance (in shares) at Dec. 31, 2021		96,734,000
Beginning Balance at Dec. 31, 2021	$ 4,021	$ 1	$ 3,450	$ 431	$ (10)	$ 149
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	84			81		3
Dividends declared on common stock	(62)			(62)
Distributions to noncontrolling interests	(4)					(4)
Stock-based compensation (in shares)		57,000
Stock-based compensation	2		3	(1)
Repurchase of common stock (in shares)		(57,000)
Repurchase of common stock	(3)			(3)
Ending Balance (in shares) at Mar. 31, 2022		96,734,000
Ending Balance at Mar. 31, 2022	4,038	$ 1	3,453	446	(10)	148
Beginning Balance (in shares) at Dec. 31, 2021		96,734,000
Beginning Balance at Dec. 31, 2021	4,021	$ 1	3,450	431	(10)	149
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	294
Other comprehensive income, net of tax	2
Ending Balance (in shares) at Sep. 30, 2022		96,751,000
Ending Balance at Sep. 30, 2022	4,125	$ 1	3,462	523	(8)	147
Beginning Balance (in shares) at Mar. 31, 2022		96,734,000
Beginning Balance at Mar. 31, 2022	4,038	$ 1	3,453	446	(10)	148
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	94			91		3
Dividends declared on common stock	(62)			(62)
Distributions to noncontrolling interests	(3)					(3)
Stock-based compensation	4		5	(1)
Taxes and other adjustments	(1)			(1)
Other comprehensive income, net of tax	1				1
Ending Balance (in shares) at Jun. 30, 2022		96,734,000
Ending Balance at Jun. 30, 2022	4,071	$ 1	3,458	473	(9)	148
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	116			113		3
Dividends declared on common stock	(62)			(62)
Distributions to noncontrolling interests	(4)					(4)
Stock-based compensation (in shares)		17,000
Stock-based compensation	4		4
Taxes and other adjustments	(1)			(1)
Other comprehensive income, net of tax	1				1
Ending Balance (in shares) at Sep. 30, 2022		96,751,000
Ending Balance at Sep. 30, 2022	4,125	$ 1	3,462	523	(8)	147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared on common stock	$ (62)
Ending Balance (in shares) at Dec. 31, 2022	96,754,549	96,755,000
Ending Balance at Dec. 31, 2022	$ 4,154	$ 1	3,469	547	(10)	147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	84			81		3
Dividends declared on common stock	(67)			(67)
Distributions to noncontrolling interests	(8)					(8)
Stock-based compensation (in shares)		135,000
Stock-based compensation	1		1
Other comprehensive income, net of tax	1				1
Ending Balance (in shares) at Mar. 31, 2023		96,890,000
Ending Balance at Mar. 31, 2023	$ 4,165	$ 1	3,470	561	(9)	142
Beginning Balance (in shares) at Dec. 31, 2022	96,754,549	96,755,000
Beginning Balance at Dec. 31, 2022	$ 4,154	$ 1	3,469	547	(10)	147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	272
Other comprehensive income, net of tax	$ 1
Ending Balance (in shares) at Sep. 30, 2023	96,971,021	96,971,000
Ending Balance at Sep. 30, 2023	$ 4,221	$ 1	3,479	608	(9)	142
Beginning Balance (in shares) at Mar. 31, 2023		96,890,000
Beginning Balance at Mar. 31, 2023	4,165	$ 1	3,470	561	(9)	142
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	94			91		3
Dividends declared on common stock	(67)			(67)
Distributions to noncontrolling interests	(2)					(2)
Stock-based compensation (in shares)		12,000
Stock-based compensation	5		6	(1)
Ending Balance (in shares) at Jun. 30, 2023		96,902,000
Ending Balance at Jun. 30, 2023	4,195	$ 1	3,476	584	(9)	143
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	94			91		3
Dividends declared on common stock	(67)			(67)
Distributions to noncontrolling interests	(4)					(4)
Stock-based compensation (in shares)		69,000
Stock-based compensation	3		3
Other comprehensive income, net of tax	$ 0
Ending Balance (in shares) at Sep. 30, 2023	96,971,021	96,971,000
Ending Balance at Sep. 30, 2023	$ 4,221	$ 1	$ 3,479	$ 608	$ (9)	$ 142

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Dividends declared on common stock (in dollars per share)	$ 0.69	$ 0.69	$ 0.69	$ 0.64	$ 0.64	$ 0.64	$ 0.64

Description of the Business and Basis of Presentation

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of the Business and Basis of Presentation

DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION

Description of the Business

Basis of Presentation

Principles of Consolidation

Amounts for consolidated VIEs are as follows:


	September 30,		December 31,

	2023		2022
	(millions)
ASSETS (a)
Cash	$	11	$	27
Accounts receivable	8		9
Other current assets	1		3
Intangible assets, net	487		498
Property, plant and equipment, net	394		403
Goodwill	25		25
	$	926	$	965

LIABILITIES (a)
Accounts payable and other current liabilities	$	2	$	4
Other noncurrent liabilities	4		4
	$	6	$	8

_____________________________________

(a)Amounts shown are 100% of the consolidated VIEs' assets and liabilities.

Related Parties

Transactions between DT Midstream and our equity method investees have been presented as related party transactions in the accompanying Consolidated Financial Statements.

Equity Method Investments

Equity method investees are described below:


	Investments As of				% Owned As of
	September 30,		December 31,		September 30,	December 31,

Equity Method Investee	2023		2022		2023	2022


	(millions)
NEXUS	$	916	$	1,313	50%	50%
Vector	137		135		40%	40%
Millennium	729		752		52.5%	52.5%
Total investments in equity method investees	$	1,782	$	2,200

Summarized income statement data is as follows:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Operating revenues	$	201	$	194	$	611	$	583
Operating expenses	94		94		282		282
Net Income	$	91	$	93	$	292	$	277

Significant Accounting Policies	9 Months Ended
Significant Accounting Policies	Sep. 30, 2023
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Cash and Cash Equivalents Cash and cash equivalents include cash in banks and highly liquid money market investments with remaining maturities of three months or less, when purchased. Cash equivalents are stated at cost, which approximates fair value. Financing Receivables Financing receivables are primarily composed of trade accounts receivable and notes receivable, which are stated at net realizable value. DT Midstream regularly monitors the credit quality of our financing receivables by reviewing counterparty credit quality indicators and monitoring for triggering events, such as a credit rating downgrade or bankruptcy. DT Midstream has three internal grades of credit quality, with internal grade 1 as the lowest risk and internal grade 3 as the highest risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through September 30, 2023. As of September 30, 2023, the Notes receivable — related party of $4 million, which originated prior to 2021, was classified as internal grade 1. There are no notes receivable on nonaccrual status and no past due financing receivables as of September 30, 2023. For trade accounts receivable, the customer allowance for expected credit loss is calculated based on specific review of future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, historical loss rates, customer trends and other relevant factors that may affect our ability to collect are also considered. Receivables are written off on a specific identification basis and determined based on the particular circumstances of the associated receivable. Uncollectible expense (recovery) was zero for the three and nine months ended September 30, 2023 and 2022. Our collections on accounts receivable from customers are current, and no material rate of historical loss was noted, which resulted in no allowance for expected credit loss as of September 30, 2023 or December 31, 2022. Any balance would be shown as a deduction from the respective financing receivable's balance in the Consolidated Statements of Financial Position. Operation and Maintenance Operation and maintenance is primarily comprised of costs for labor and employee benefits, outside services, materials, compression, purchased natural gas, operating lease costs, office costs, and other operating and maintenance costs.

Goodwill

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

GOODWILL

The following is the summary of the carrying value of goodwill:



	September 30,		December 31,
	2023		2022
	(millions)


Pipeline	$	53	$	53
Gathering	420		420
Total goodwill	$	473	$	473

Revenue

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Revenue

REVENUE

Disaggregation of Revenue

The following is a summary of revenues disaggregated by segment:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Pipeline (a)	$	96	$	87	$	271	$	247
Gathering	138		148		407		430

Total operating revenues	$	234	$	235	$	678	$	677

__________________________________

Nature of Services

Contract Liabilities

The following is a summary of contract liability activity:


	2023
	(millions)
Balance as of January 1	$	32
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period	62
Revenue recognized that was included in the balance at the beginning of the period	(3)

Balance as of September 30	$	91

The following table presents contract liability amounts as of September 30, 2023 that are expected to be recognized as revenue in future periods:


	(millions)
Remainder of 2023	$	3
2024	13
2025	13
2026	13
2027	13
2028 and thereafter	36
Total	$	91

Transaction Price Allocated to the Remaining Performance Obligations


	(millions)
Remainder of 2023	$	27
2024	129
2025	133
2026	103
2027	71
2028 and thereafter	247
Total	$	710

Costs to Obtain or Fulfill a Contract

Earnings Per Share and Dividends

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Earnings Per Share and Dividends

EARNINGS PER SHARE AND DIVIDENDS

The following is a reconciliation of DT Midstream's basic and diluted earnings per share calculation:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	91	$	113	$	263	$	285
Average number of common shares outstanding — basic	97.0		96.7		96.9		96.7

Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.5		0.3		0.5		0.3
Average number of common shares outstanding — diluted	97.5		97.0		97.4		97.0

Basic Earnings per Common Share	$	0.94	$	1.17	$	2.72	$	2.94
Diluted Earnings per Common Share	$	0.94	$	1.16	$	2.70	$	2.94

DT Midstream declared the following cash dividends:


Dividends Declared	Dividend Amount				Dividend Payment Date
(quarter ended)	(per-share)		(millions)



2022
March 31	$	0.64	$	62	April 2022
June 30	$	0.64	$	62	July 2022
September 30	$	0.64	$	62	October 2022
December 31	$	0.64	$	62	January 2023
2023
March 31	$	0.69	$	67	April 2023
June 30	$	0.69	$	67	July 2023
September 30	$	0.69	$	67	October 2023

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Effective Tax Rates DT Midstream records income taxes during the interim period using an estimated annual effective tax rate (ETR) and recognizes specific events discretely as they occur. The interim period ETRs of DT Midstream are 26% and 6% for the three months ended September 30, 2023 and 2022, respectively, and 27% and 18% for the nine months ended September 30, 2023 and 2022, respectively. The difference between the interim period ETRs and federal statutory rate of 21% is primarily related to state income taxes. The changes in the ETRs for the comparative periods is primarily driven by the remeasurement of state deferred taxes due to state tax rate changes enacted in 2022.

Fair Value

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value

FAIR VALUE

•Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that DT Midstream has the ability to access as of the reporting date.

Fair Value of Financial Instruments

The following table presents the carrying amount and fair value of financial instruments:


	September 30, 2023								December 31, 2022
	Carrying		Fair Value						Carrying		Fair Value
	Amount		Level 1		Level 2		Level 3		Amount		Level 1		Level 2		Level 3
	(millions)
Cash equivalents (a)	$	13	$	—	$	13	$	—	$	—	$	—	$	—	$	—
Long-term notes receivable — related party	4		—		—		4		4		—		—		4
Short-term borrowings (a)	125		—		125		—		330		—		330		—
Long-term debt (b)	$	3,064	$	—	$	2,693	$	—	$	3,059	$	—	$	2,701	$	—

______________________________________

(a)Short-term borrowings and money market cash equivalents are stated at cost, which approximates fair value.

(b)Carrying value represents principal of $3,099 million, net of unamortized debt discounts and issuance costs.

Debt

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Debt

DEBT

Long-Term Debt

DT Midstream's long-term debt outstanding included:


			Maturity	September 30,		December 31,
Title	Type	Interest Rate	Date (d)	2023		2022
				(millions)
2029 Notes	Senior Notes (a)	4.125%	2029	$	1,100	$	1,100
2031 Notes	Senior Notes (a)	4.375%	2031	1,000		1,000
2032 Notes	Senior Secured Notes (b)	4.300%	2032	600		600
Term Loan Facility	Term Loan Facility	Variable (c)	2028	399		399
Long-term debt principal				3,099		3,099
Unamortized debt discount				(2)		(3)
Unamortized debt issuance costs				(33)		(37)

Long-term debt				$	3,064	$	3,059

______________________________

(a) Interest payable semi-annually in arrears each June 15 and December 15.

(b) Interest payable semi-annually in arrears each April 15 and October 15.

(d) DT Midstream does not have any scheduled debt maturities until 2028.

Short-Term Credit Arrangements and Borrowings

The following table presents the availability under the Revolving Credit Facility:


	September 30,
	2023
	(millions)
Total availability
Revolving Credit Facility, expiring October 2027	$	1,000
Amounts outstanding
Revolving Credit Facility borrowings	125
Letters of credit	16
	141
Net availability	$	859

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES From time to time, DT Midstream is subject to legal, administrative and environmental proceedings before various courts, arbitration panels and governmental agencies concerning claims arising in the ordinary course of business. These proceedings include certain contract disputes, additional environmental reviews and investigations, audits and pending judicial matters. DT Midstream cannot predict the final disposition of such proceedings. DT Midstream regularly reviews legal matters and records provisions for claims that we can estimate and are considered probable of loss. The amount or range of reasonably possible losses is not anticipated to, either individually or in the aggregate, materially adversely affect DT Midstream’s business, financial condition and results of operations. Guarantees In certain limited circumstances, DT Midstream enters into contractual guarantees. DT Midstream may guarantee another entity's obligation in the event it fails to perform and may provide guarantees in certain indemnification agreements. DT Midstream did not have any guarantees of other parties' obligations as of September 30, 2023. Surety Bonds In certain limited circumstances, DT Midstream enters into contracts that require us to obtain external surety bonds to secure our payment and performance. DT Midstream agrees to indemnify the issuers of these surety bonds for amounts, if any, paid by them under these agreements. In the event that any surety bonds are called for non-performance, DT Midstream would be obligated to reimburse the issuer of the surety bond. The maximum potential indemnification under our surety bond agreements as of September 30, 2023 is $32 million. Vector Line of Credit DT Midstream is the lender under a revolving term credit facility to Vector, the borrower, in the amount of Canadian $70 million. The credit facility was executed in response to the passage of Canadian regulations requiring oil and gas pipelines to demonstrate their financial ability to respond to a catastrophic event and exists for the sole purpose of satisfying these regulations. Vector may only draw upon the facility if the funds are required to respond to a catastrophic event. The maximum potential payout as of September 30, 2023 is USD $52 million. The funding of a loan under the terms of the credit facility is considered remote. Environmental Contingencies In order to comply with certain state environmental regulations, DT Midstream has an obligation to restore pipeline right-of-way slope failures that may arise in the ordinary course of business in the Utica and Marcellus formations. DT Midstream conducted an evaluation, which was prioritized based on the severity and proximity of remaining locations, and used updated cost information to assess the adequacy of the estimate for the contingent liability accrual. Based on this evaluation, we recorded a reduction to the contingent liability accrual and decrease to operation and maintenance expense of $6 million during the three months ended September 30, 2023. As of September 30, 2023 and December 31, 2022, DT Midstream had accrued contingent liabilities of $13 million and $19 million, respectively, for future slope restoration expenditures. The accrual is included in Other current liabilities and Other liabilities in the Consolidated Statements of Financial Position. While restoration and continued evaluation is ongoing, DT Midstream believes the accrued amounts are sufficient to cover estimated future expenditures.

Segment and Related Information

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Segment and Related Information

SEGMENT AND RELATED INFORMATION

DT Midstream sets strategic goals, allocates resources, and evaluates performance based on the following structure:

The following table presents financial data by business segment:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Operating Revenues
Pipeline	$	96	$	87	$	271	$	247
Gathering	138		148		407		430
Total	$	234	$	235	$	678	$	677


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	70	$	185	$	170
Gathering	27		43		78		115
Total	$	91	$	113	$	263	$	285

Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENT Dividend Declaration On November 1, 2023, DT Midstream announced that our Board of Directors declared a quarterly dividend of $0.69 per share of common stock. The dividend is payable to our stockholders of record as of December 18, 2023 and is expected to be paid on January 15, 2024.

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The DT Midstream Consolidated Financial Statements and Notes to Consolidated Financial Statements are prepared under GAAP. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from DT Midstream’s estimates. DT Midstream believes the assumptions underlying these financial statements are reasonable. Certain prior-period amounts have been reclassified to conform to current-year presentation. In DT Midstream's opinion, the accompanying unaudited Consolidated Financial Statements include all adjustments, consisting of normal recurring adjustments, necessary to present a fair statement of our financial position as of September 30, 2023, results of operations for the three and nine months ended September 30, 2023 and 2022, statement of changes in stockholders' equity for the three and nine months ended September 30, 2023 and 2022, and cash flows for the nine months ended September 30, 2023 and 2022. The balance sheet as of December 31, 2022 was derived from audited annual financial statements but does not include all disclosures required by GAAP. Financial results for this interim period are not necessarily indicative of results that may be expected for any other interim period or for the year ending December 31, 2023. The Consolidated Financial Statements should be read in conjunction with DT Midstream's Consolidated Financial Statements and Notes to Consolidated Financial Statements included in DT Midstream's 2022 Annual Report on Form 10-K.
Principles of Consolidation	Principles of Consolidation DT Midstream consolidates all majority-owned subsidiaries and investments in entities in which we have a controlling influence. Non-controlled investments are accounted for using the equity method of accounting when DT Midstream is able to significantly influence the operating policies of the investee. When DT Midstream does not influence the operating policies of an investee, the equity investment is measured at fair value, if readily determinable, or if not readily determinable, at cost less impairment, if applicable. DT Midstream eliminates all intercompany balances and transactions. DT Midstream evaluates whether an entity is a VIE whenever reconsideration events occur. DT Midstream consolidates VIEs for which we are the primary beneficiary. If DT Midstream is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, DT Midstream considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. DT Midstream performs ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed. DT Midstream owns an 85% interest in the Stonewall Gas Gathering VIE and is the primary beneficiary, therefore Stonewall Gas Gathering is consolidated. DT Midstream owns a 50% interest in the South Romeo VIE and is the primary beneficiary, therefore South Romeo is consolidated.
Cash and Cash Equivalents	Cash and Cash EquivalentsCash and cash equivalents include cash in banks and highly liquid money market investments with remaining maturities of three months or less, when purchased. Cash equivalents are stated at cost, which approximates fair value.
Financing Receivables	Financing Receivables Financing receivables are primarily composed of trade accounts receivable and notes receivable, which are stated at net realizable value. DT Midstream regularly monitors the credit quality of our financing receivables by reviewing counterparty credit quality indicators and monitoring for triggering events, such as a credit rating downgrade or bankruptcy. DT Midstream has three internal grades of credit quality, with internal grade 1 as the lowest risk and internal grade 3 as the highest risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through September 30, 2023. As of September 30, 2023, the Notes receivable — related party of $4 million, which originated prior to 2021, was classified as internal grade 1. There are no notes receivable on nonaccrual status and no past due financing receivables as of September 30, 2023. For trade accounts receivable, the customer allowance for expected credit loss is calculated based on specific review of future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, historical loss rates, customer trends and other relevant factors that may affect our ability to collect are also considered. Receivables are written off on a specific identification basis and determined based on the particular circumstances of the associated receivable.

Description of the Business and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

Amounts for consolidated VIEs are as follows:


	September 30,		December 31,

	2023		2022
	(millions)
ASSETS (a)
Cash	$	11	$	27
Accounts receivable	8		9
Other current assets	1		3
Intangible assets, net	487		498
Property, plant and equipment, net	394		403
Goodwill	25		25
	$	926	$	965

LIABILITIES (a)
Accounts payable and other current liabilities	$	2	$	4
Other noncurrent liabilities	4		4
	$	6	$	8

_____________________________________

(a)Amounts shown are 100% of the consolidated VIEs' assets and liabilities.

Schedule of Equity Method Investments

Equity method investees are described below:


	Investments As of				% Owned As of
	September 30,		December 31,		September 30,	December 31,

Equity Method Investee	2023		2022		2023	2022


	(millions)
NEXUS	$	916	$	1,313	50%	50%
Vector	137		135		40%	40%
Millennium	729		752		52.5%	52.5%
Total investments in equity method investees	$	1,782	$	2,200

Summarized income statement data is as follows:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Operating revenues	$	201	$	194	$	611	$	583
Operating expenses	94		94		282		282
Net Income	$	91	$	93	$	292	$	277

Goodwill (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following is the summary of the carrying value of goodwill:



	September 30,		December 31,
	2023		2022
	(millions)


Pipeline	$	53	$	53
Gathering	420		420
Total goodwill	$	473	$	473

Revenue (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following is a summary of revenues disaggregated by segment:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Pipeline (a)	$	96	$	87	$	271	$	247
Gathering	138		148		407		430

Total operating revenues	$	234	$	235	$	678	$	677

__________________________________

Summary of Contact Liability Activity

The following is a summary of contract liability activity:


	2023
	(millions)
Balance as of January 1	$	32
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period	62
Revenue recognized that was included in the balance at the beginning of the period	(3)

Balance as of September 30	$	91

Revenue Expected to be Recognized in Future Periods

The following table presents contract liability amounts as of September 30, 2023 that are expected to be recognized as revenue in future periods:


	(millions)
Remainder of 2023	$	3
2024	13
2025	13
2026	13
2027	13
2028 and thereafter	36
Total	$	91


	(millions)
Remainder of 2023	$	27
2024	129
2025	133
2026	103
2027	71
2028 and thereafter	247
Total	$	710

Earnings Per Share and Dividends (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share

The following is a reconciliation of DT Midstream's basic and diluted earnings per share calculation:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	91	$	113	$	263	$	285
Average number of common shares outstanding — basic	97.0		96.7		96.9		96.7

Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.5		0.3		0.5		0.3
Average number of common shares outstanding — diluted	97.5		97.0		97.4		97.0

Basic Earnings per Common Share	$	0.94	$	1.17	$	2.72	$	2.94
Diluted Earnings per Common Share	$	0.94	$	1.16	$	2.70	$	2.94

Schedule of Cash Dividends Declared

DT Midstream declared the following cash dividends:


Dividends Declared	Dividend Amount				Dividend Payment Date
(quarter ended)	(per-share)		(millions)



2022
March 31	$	0.64	$	62	April 2022
June 30	$	0.64	$	62	July 2022
September 30	$	0.64	$	62	October 2022
December 31	$	0.64	$	62	January 2023
2023
March 31	$	0.69	$	67	April 2023
June 30	$	0.69	$	67	July 2023
September 30	$	0.69	$	67	October 2023

Fair Value (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Carrying Amount of Fair Value of Financial Instruments

The following table presents the carrying amount and fair value of financial instruments:


	September 30, 2023								December 31, 2022
	Carrying		Fair Value						Carrying		Fair Value
	Amount		Level 1		Level 2		Level 3		Amount		Level 1		Level 2		Level 3
	(millions)
Cash equivalents (a)	$	13	$	—	$	13	$	—	$	—	$	—	$	—	$	—
Long-term notes receivable — related party	4		—		—		4		4		—		—		4
Short-term borrowings (a)	125		—		125		—		330		—		330		—
Long-term debt (b)	$	3,064	$	—	$	2,693	$	—	$	3,059	$	—	$	2,701	$	—

______________________________________

(a)Short-term borrowings and money market cash equivalents are stated at cost, which approximates fair value.

(b)Carrying value represents principal of $3,099 million, net of unamortized debt discounts and issuance costs.

Debt (Tables)

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Outstanding

DT Midstream's long-term debt outstanding included:


			Maturity	September 30,		December 31,
Title	Type	Interest Rate	Date (d)	2023		2022
				(millions)
2029 Notes	Senior Notes (a)	4.125%	2029	$	1,100	$	1,100
2031 Notes	Senior Notes (a)	4.375%	2031	1,000		1,000
2032 Notes	Senior Secured Notes (b)	4.300%	2032	600		600
Term Loan Facility	Term Loan Facility	Variable (c)	2028	399		399
Long-term debt principal				3,099		3,099
Unamortized debt discount				(2)		(3)
Unamortized debt issuance costs				(33)		(37)

Long-term debt				$	3,064	$	3,059

______________________________

(a) Interest payable semi-annually in arrears each June 15 and December 15.

(b) Interest payable semi-annually in arrears each April 15 and October 15.

(d) DT Midstream does not have any scheduled debt maturities until 2028.

Schedule of Availability Under the Revolving Credit Facility

The following table presents the availability under the Revolving Credit Facility:


	September 30,
	2023
	(millions)
Total availability
Revolving Credit Facility, expiring October 2027	$	1,000
Amounts outstanding
Revolving Credit Facility borrowings	125
Letters of credit	16
	141
Net availability	$	859

Segment and Related Information (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Financial Data by Business Segment

The following table presents financial data by business segment:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Operating Revenues
Pipeline	$	96	$	87	$	271	$	247
Gathering	138		148		407		430
Total	$	234	$	235	$	678	$	677


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	70	$	185	$	170
Gathering	27		43		78		115
Total	$	91	$	113	$	263	$	285

Description of the Business and Basis of Presentation (Narrative) (Details)	1 Months Ended		9 Months Ended
	May 31, 2023 USD ($)	Oct. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Related Party Transaction [Line Items]
Number of segments \| segment			2
Amount by which the share of the underlying equity in the net assets exceeds the carrying amount			$ 356,000,000		$ 368,000,000
Undistributed earnings from equity method investments			0		$ 43,000,000
Payments to acquire equity method investments			$ 6,000,000	$ 4,000,000
NEXUS Senior Unsecured Notes \| Senior Notes
Related Party Transaction [Line Items]
Long-term debt issued	$ 750,000,000
Interest Rate	5.52%
Proceeds from issuance of debt	$ 371,000,000
Millennium
Related Party Transaction [Line Items]
Amount by which the share of the underlying equity in the net assets exceeds the carrying amount		$ 343,000,000
Payments to acquire equity method investments		$ 552,000,000
Additional ownership interest acquired		0.2625
Ownership percentage		52.50%	52.50%		52.50%
Variable Interest Entity, Primary Beneficiary, Stonewall Gas Gathering
Related Party Transaction [Line Items]
VIE ownership percentage			85.00%
Variable Interest Entity, Primary Beneficiary, South Romeo
Related Party Transaction [Line Items]
VIE ownership percentage			50.00%

Description of the Business and Basis of Presentation (Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Cash	$ 30	$ 61
Accounts receivable	146	161
Intangible assets, net	1,982	2,025
Property, plant and equipment, net	4,348	3,806
Goodwill	473	473
Total Assets	8,862	8,833
LIABILITIES
Other noncurrent liabilities	1,153	1,006
Total Liabilities	4,641	4,679
Variable interest entity, primary beneficiary
ASSETS
Cash	11	27
Accounts receivable	8	9
Other current assets	1	3
Intangible assets, net	487	498
Property, plant and equipment, net	394	403
Goodwill	25	25
Total Assets	926	965
LIABILITIES
Accounts payable and other current liabilities	2	4
Other noncurrent liabilities	4	4
Total Liabilities	$ 6	$ 8

Description of the Business and Basis of Presentation (Equity Method Investees) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Oct. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investments As of	$ 1,782	$ 2,200
NEXUS
Schedule of Equity Method Investments [Line Items]
Investments As of	$ 916	$ 1,313
% Owned As of	50.00%	50.00%
Vector
Schedule of Equity Method Investments [Line Items]
Investments As of	$ 137	$ 135
% Owned As of	40.00%	40.00%
Millennium
Schedule of Equity Method Investments [Line Items]
Investments As of	$ 729	$ 752
% Owned As of	52.50%	52.50%	52.50%

Description of the Business and Basis of Presentation (Summarized Income Statement Data) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 234			$ 235			$ 678	$ 677
Net Income	94	$ 94	$ 84	116	$ 94	$ 84	272	294
Equity method investment, non-consolidated investees
Schedule of Equity Method Investments [Line Items]
Operating revenues	201			194			611	583
Operating expenses	94			94			282	282
Net Income	$ 91			$ 93			$ 292	$ 277

Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
Significant Accounting Policies (Details)	Sep. 30, 2023 USD ($) internal_grade	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) internal_grade	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Financing Receivable, Past Due [Line Items]
Number of internal grades of credit quality \| internal_grade	3		3
Specific review of probable future collections based on receivable balances, threshold duration			30 days
Uncollectible expense (recovery)	$ 0	$ 0	$ 0	$ 0
Allowance for expected credit loss related to accounts receivable	0		0		$ 0
Past due
Financing Receivable, Past Due [Line Items]
Financing receivables	0		0
Notes receivable
Financing Receivable, Past Due [Line Items]
Financing receivables on nonaccrual status	0		0
Notes receivable \| Internal grade 1 \| Related Party
Financing Receivable, Past Due [Line Items]
Financing receivable originated prior to 2021	$ 4,000,000		$ 4,000,000

Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 473	$ 473
Operating segments \| Pipeline
Goodwill [Line Items]
Goodwill	53	53
Operating segments \| Gathering
Goodwill [Line Items]
Goodwill	$ 420	$ 420

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 234	$ 235	$ 678	$ 677
Pipeline
Disaggregation of Revenue [Line Items]
Total operating revenues	96	87	271	247
Lease revenue outside scope of Topic 606	2	3	5	7
Gathering
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 138	$ 148	$ 407	$ 430

Revenue (Contract Liabilities) (Details) $ in Millions	9 Months Ended
Revenue (Contract Liabilities) (Details) $ in Millions	Sep. 30, 2023 USD ($)
Change In Contract With Customer, Liability [Roll Forward]
Beginning Balance	$ 32
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period	62
Revenue recognized that was included in the balance at the beginning of the period	(3)
Ending Balance	$ 91

Revenue (Expected Recognition of Contract Liabilities) (Details) $ in Millions	Sep. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 91
Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	710
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 3
Remaining performance obligation, expected timing of satisfaction	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 \| Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 27
Remaining performance obligation, expected timing of satisfaction	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 \| Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 129
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 133
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 \| Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 103
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01 \| Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 71
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 36
Remaining performance obligation, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01 \| Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 247
Remaining performance obligation, expected timing of satisfaction

Revenue (Expected Timing of Performance Obligation Satisfaction Related to Fixed Consideration) (Details) $ in Millions	Sep. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 91
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 3
Remaining performance obligation, expected timing of satisfaction	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 13
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 36
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 710
Fixed-price Contract \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 27
Remaining performance obligation, expected timing of satisfaction	3 months
Fixed-price Contract \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 129
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 133
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 103
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 71
Remaining performance obligation, expected timing of satisfaction	1 year
Fixed-price Contract \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 247
Remaining performance obligation, expected timing of satisfaction

Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Revenue (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Capitalized contract cost, net	$ 18		$ 18		$ 19
Capitalized contract cost, amortization expense (less than)	$ 1	$ 1	$ 1	$ 1

Earnings Per Share and Dividends (Reconciliation of Basic and Diluted Earnings Per Share Calculation) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$ 91	$ 113	$ 263	$ 285
Average number of common shares outstanding — basic (in shares)	97.0	96.7	96.9	96.7
Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards (in shares)	0.5	0.3	0.5	0.3
Average number of common shares outstanding — diluted (in shares)	97.5	97.0	97.4	97.0
Basic earnings per common share (in dollars per share)	$ 0.94	$ 1.17	$ 2.72	$ 2.94
Diluted earnings per common share (in dollars per share)	$ 0.94	$ 1.16	$ 2.70	$ 2.94

Earnings Per Share and Dividends (Dividends Declared) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Earnings Per Share [Abstract]
Quarterly Dividend (in dollars per share)	$ 0.69	$ 0.69	$ 0.69	$ 0.64	$ 0.64	$ 0.64	$ 0.64
Dividend Amount	$ 67	$ 67	$ 67	$ 62	$ 62	$ 62	$ 62

Income Taxes (Details)	3 Months Ended		9 Months Ended
Income Taxes (Details)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Estimated annual effective tax rate	26.00%	6.00%	27.00%	18.00%

Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt principal	$ 3,099	$ 3,099
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	125	330
Long-term debt	3,064	3,059
Carrying Amount \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term notes receivable - related party	4	4
Carrying Amount \| Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	13	0
Fair Value \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	0	0
Long-term debt	0	0
Fair Value \| Level 1 \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term notes receivable - related party	0	0
Fair Value \| Level 1 \| Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Fair Value \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	125	330
Long-term debt	2,693	2,701
Fair Value \| Level 2 \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term notes receivable - related party	0	0
Fair Value \| Level 2 \| Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	13	0
Fair Value \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings	0	0
Long-term debt	0	0
Fair Value \| Level 3 \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term notes receivable - related party	4	4
Fair Value \| Level 3 \| Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	$ 0	$ 0

Debt (Narrative) (Details) $ in Millions	9 Months Ended
Debt (Narrative) (Details) $ in Millions	Sep. 30, 2023 USD ($)	Apr. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Line Of Credit Facility [Line Items]
Debt amendment cost			$ 8
Debt service coverage ratio	8.3
Consolidated net leverage ratio	2.4
Interest coverage ratio	7.8
Performance surety bonds
Line Of Credit Facility [Line Items]
Performance bonds outstanding		$ 23
Secured Revolving Credit Facility expiring June 2026 \| Revolving Credit Facility
Line Of Credit Facility [Line Items]
Fees incurred	$ 7
Maximum consolidated net leverage ratio	5
Minimum interest coverage ratio	2.5
Variable rate Term Loan Facility due 2028
Line Of Credit Facility [Line Items]
Minimum debt service coverage ratio	1.1

Debt (Long-term Debt Outstanding) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt principal	$ 3,099	$ 3,099
Unamortized debt discount	(2)	(3)
Unamortized debt issuance costs	(33)	(37)
Long-term debt	$ 3,064	3,059
4.125% Senior Notes due 2029 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	4.125%
Long-term debt principal	$ 1,100	1,100
4.375% Senior Notes due 2031 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	4.375%
Long-term debt principal	$ 1,000	1,000
4.300% Senior Secured Notes due 2032 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	4.30%
Long-term debt principal	$ 600	600
Variable rate Term Loan Facility due 2028
Debt Instrument [Line Items]
Long-term debt principal	$ 399	$ 399
Variable rate Term Loan Facility due 2028 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.11%

Debt (Availability Under the Revolving Credit Facility) (Details) - Revolving Credit Facility, expiring October 2027 $ in Millions	Sep. 30, 2023 USD ($)
Line Of Credit Facility [Line Items]
Amounts outstanding	$ 141
Net availability	859
Revolving Credit Facility
Line Of Credit Facility [Line Items]
Total availability	1,000
Amounts outstanding	125
Letter of credit
Line Of Credit Facility [Line Items]
Amounts outstanding	$ 16

Commitments and Contingencies (Narrative) (Details) $ in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 CAD ($)	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, revision in estimates	$ 6
Accrued contingent liabilities	13		$ 19
Performance surety bonds
Loss Contingencies [Line Items]
Guarantee value	32
Revolving Term Credit Facility \| Vector
Loss Contingencies [Line Items]
Financing receivables		$ 70
Maximum potential payout under line of credit	$ 52

Segment and Related Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	$ 234	$ 235	$ 678	$ 677
Net Income Attributable to DT Midstream	91	113	263	285
Pipeline
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	96	87	271	247
Net Income Attributable to DT Midstream	64	70	185	170
Gathering
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	138	148	407	430
Net Income Attributable to DT Midstream	$ 27	$ 43	$ 78	$ 115

Subsequent Event (Details) - $ / shares		3 Months Ended
Subsequent Event (Details) - $ / shares	Nov. 01, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Subsequent Event [Line Items]
Dividends declared on common stock (in dollars per share)		$ 0.69	$ 0.69	$ 0.69	$ 0.64	$ 0.64	$ 0.64	$ 0.64
Subsequent Event
Subsequent Event [Line Items]
Dividends declared on common stock (in dollars per share)	$ 0.69

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