10-Q

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 June 30, 2023

Or

☐ 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 June 30, 2023:

Description	Shares
Common stock, par value $0.01	96,902,277

1

TABLE OF CONTENTS

		Page
	Definitions	1
	Filing Format	3
	Forward-Looking Statements	3
PART I — FINANCIAL INFORMATION
Item 1.	Financial Statements
	DT Midstream Consolidated Financial Statements (Unaudited)	5
	Notes to Consolidated Financial Statements (Unaudited)	11
	Note 1 — Description of the Business and Basis of Presentation	11
	Note 2 — Significant Accounting Policies	13
	Note 3 — Goodwill	14
	Note 4 — Revenue	14
	Note 5 — Earnings Per Share and Dividends	17
	Note 6 — Income Taxes	17
	Note 7 — Fair Value	18
	Note 8 — Debt	19
	Note 9 — Commitments and Contingencies	20
	Note 10 — Segment and Related Information	21
	Note 11 — Subsequent Event	21
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	30
Item 4.	Controls and Procedures	31
PART II — OTHER INFORMATION
Item 1.	Legal Proceedings	31
Item 1A.	Risk Factors	31
Item 4.	Mine Safety Disclosure	31
Item 5.	Other Information	31
Item 6.	Exhibits	32
	Signature	33

2

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 385-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
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	System is comprised of LEAP, Blue Union and associated facilities
LEAP	Louisiana Energy Access Project gathering lateral pipeline, a 155-mile pipeline gathering Haynesville shale gas to markets in the Gulf Coast region
LNG	Liquefied natural gas
Michigan System	A 336-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

1

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

2

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 the impact of inflation on our business;

•competitive conditions in our industry;

•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;

•competition from the same and alternative energy sources;

•our ability to successfully 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;

•energy efficiency and technology trends;

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

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

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

•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 ongoing conflict between Russia and Ukraine, including resulting commodity price volatility and risk of cyber-based attacks;

3

•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;

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

•the effects of existing and future laws and governmental regulations;

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

•the timing and extent of changes in commodity prices;

•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.

4

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

DT Midstream, Inc.

Consolidated Statements of Operations

(Unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Revenues
Operating revenues	$	224	$	227	$	444	$	442
Operating Expenses
Operation and maintenance	60		63		118		124
Depreciation and amortization	44		42		87		84
Taxes other than income	6		8		15		16
Asset (gains) losses and impairments, net	(3)		(23)		(3)		(23)
Operating Income	117		137		227		241
Other (Income) and Deductions
Interest expense	35		33		73		64
Interest income	(1)		(1)		(1)		(1)
Earnings from equity method investees	(41)		(35)		(91)		(71)
Loss from financing activities	—		13		—		13
Other (income) and expense	—		—		(1)		—
Income Before Income Taxes	124		127		247		236
Income Tax Expense	30		33		69		58
Net Income	94		94		178		178
Less: Net Income Attributable to Noncontrolling Interests	3		3		6		6
Net Income Attributable to DT Midstream	$	91	$	91	$	172	$	172
Basic Earnings per Common Share
Net Income Attributable to DT Midstream	$	0.93	$	0.93	$	1.77	$	1.78
Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	0.93	$	0.93	$	1.76	$	1.77
Weighted Average Common Shares Outstanding
Basic	96.9		96.7		96.9		96.7
Diluted	97.4		97.1		97.4		97.0

See Notes to Consolidated Financial Statements (Unaudited)

5

DT Midstream, Inc.

Consolidated Statements of Comprehensive Income

(Unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Net Income	$	94	$	94	$	178	$	178
Foreign currency translation and unrealized gain on derivatives, net of tax	—		1		1		1
Other comprehensive income	—		1		1		1
Comprehensive income	94		95		179		179
Less: Comprehensive income attributable to noncontrolling interests	3		3		6		6
Comprehensive Income Attributable to DT Midstream	$	91	$	92	$	173	$	173

See Notes to Consolidated Financial Statements (Unaudited)

6

DT Midstream, Inc.

Consolidated Statements of Financial Position

(Unaudited)

	June 30,		December 31,
	2023		2022
	(millions)
ASSETS
Current Assets
Cash and cash equivalents	$	45	$	61
Accounts receivable (net of $— allowance for expected credit loss for each period end)	144		161
Deferred property taxes	11		22
Prepaid expenses and other	10		18
	210		262
Investments
Investments in equity method investees	1,789		2,200
Property
Property, plant, and equipment	4,967		4,534
Accumulated depreciation	(786)		(728)
	4,181		3,806
Other Assets
Goodwill	473		473
Long-term notes receivable — related party	4		4
Operating lease right-of-use assets	43		31
Intangible assets, net	1,996		2,025
Other	30		32
	2,546		2,565
Total Assets	$	8,726	$	8,833

See Notes to Consolidated Financial Statements (Unaudited)

7

DT Midstream, Inc.

Consolidated Statements of Financial Position

(Unaudited)

	June 30,		December 31,
	2023		2022
	(millions, except shares)
LIABILITIES AND EQUITY
Current Liabilities
Accounts payable	$	125	$	119
Short-term borrowings	100		330
Operating lease liabilities	16		16
Dividends payable	67		62
Interest payable	10		10
Property taxes payable	22		29
Accrued compensation	10		20
Other	11		28
	361		614
Long-Term Debt	3,062		3,059
Other Liabilities
Deferred income taxes	985		923
Operating lease liabilities	30		19
Other	93		64
	1,108		1,006
Total Liabilities	4,531		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 June 30, 2023 and December 31, 2022)	—		—
Common stock ($0.01 par value, 550,000,000 shares authorized, and 96,902,277 and 96,754,549 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively)	1		1
Additional paid in capital	3,476		3,469
Retained earnings	584		547
Accumulated other comprehensive income (loss)	(9)		(10)
Total DT Midstream Equity	4,052		4,007
Noncontrolling interests	143		147
Total Equity	4,195		4,154
Total Liabilities and Equity	$	8,726	$	8,833

See Notes to Consolidated Financial Statements (Unaudited)

8

DT Midstream, Inc.

Consolidated Statements of Cash Flows

(Unaudited)

	Six Months Ended
	June 30,
	2023		2022
	(millions)
Operating Activities
Net Income	$	178	$	178
Adjustments to reconcile Net Income to Net cash and cash equivalents from operating activities:
Depreciation and amortization	87		84
Stock-based compensation	10		8
Amortization of operating lease right-of-use assets	9		9
Deferred income taxes	62		48
Earnings from equity method investees	(91)		(71)
Dividends from equity method investees	113		86
Asset (gains) losses and impairments, net	—		(17)
Loss from financing activities	—		13
Changes in assets and liabilities:
Accounts receivable, net	17		32
Accounts payable	(6)		(1)
Interest payable	—		6
Other current and noncurrent assets and liabilities	10		4
Net cash and cash equivalents from operating activities	389		379
Investing Activities
Plant and equipment expenditures	(421)		(55)
Proceeds from sale of notes receivable	—		22
Distributions from equity method investees	396		2
Contributions to equity method investees	(6)		(2)
Notes receivable — third party	—		2
Net cash and cash equivalents from (used for) investing activities	(31)		(31)
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	305		—
Repayment of borrowings under the Revolving Credit Facility	(535)		—
Repurchase of common stock	—		(3)
Distributions to noncontrolling interests	(10)		(7)
Dividends paid on common stock	(129)		(120)
Other financing activities	(5)		—
Net cash and cash equivalents from (used for) financing activities	(374)		(135)
Net Increase (Decrease) in Cash and Cash Equivalents	(16)		213
Cash and Cash Equivalents at Beginning of Period	61		132
Cash and Cash Equivalents at End of Period	$	45	$	345
Supplemental disclosure of cash information
Cash paid for:
Interest, net of interest capitalized	$	69	$	55
Income taxes	18		7
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable and other accruals	$	111	$	20

See Notes to Consolidated Financial Statements (Unaudited)

9

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

				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

See Notes to Consolidated Financial Statements (Unaudited)

10

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 June 30, 2023, results of operations for the three and six months ended June 30, 2023 and 2022, statement of changes in stockholders' equity for the three and six months ended June 30, 2023 and 2022, and cash flows for the six months ended June 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.

11

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 June 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:

	June 30,		December 31,
	2023		2022
	(millions)
ASSETS (a)
Cash	$	12	$	27
Accounts receivable	9		9
Other current assets	1		3
Intangible assets, net	490		498
Property, plant and equipment, net	397		403
Goodwill	25		25
	$	934	$	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 June 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 $360 million and $368 million, respectively. The difference will be amortized over the life of the underlying assets. As of June 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 Statement of Cash Flows.

12

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

Equity method investees are described below:

	Investments As of				% Owned As of
	June 30,		December 31,		June 30,	December 31,
Equity Method Investee	2023		2022		2023	2022
	(millions)
NEXUS	$	915	$	1,313	50%	50%
Vector	137		135		40%	40%
Millennium	737		752		52.5%	52.5%
Total investments in equity method investees	$	1,789	$	2,200

During the three months ended June 30, 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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Operating revenues	$	199	$	191	$	410	$	389
Operating expenses	94		94		188		188
Net Income	$	91	$	89	$	201	$	184

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 June 30, 2023. As of June 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 June 30, 2023.

13

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

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 six months ended June 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 June 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 six months ended June 30, 2023.

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

	June 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 estimated 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, a sustained further decline in our market capitalization, or a further decline in midstream industry transaction multiples, this may lead to a goodwill impairment in the future.

NOTE 4 — REVENUE

Disaggregation of Revenue

The following is a summary of revenues disaggregated by segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Pipeline (a)	$	90	$	83	$	175	$	160
Gathering	134		144		269		282
Total operating revenues	$	224	$	227	$	444	$	442

__________________________________

(a)Includes revenues outside the scope of Topic 606 primarily related to contracts accounted for as leases of $2 million for both the three months ended June 30, 2023 and 2022, and $3 million and $4 million for the six months ended June 30, 2023 and 2022, respectively.

14

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

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	29
Revenue recognized that was included in the balance at the beginning of the period	(2)
Balance as of June 30	$	59

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.

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

	(millions)
Remainder of 2023	$	2
2024	7
2025	7
2026	7
2027	8
2028 and thereafter	28
Total	$	59

15

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

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 June 30, 2023 that are expected to be recognized as revenue in future periods:

	(millions)
Remainder of 2023	$	53
2024	129
2025	133
2026	103
2027	71
2028 and thereafter	247
Total	$	736

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 June 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 six months ended June 30, 2023 and 2022, we recognized approximately $1 million of amortization expense related to such capitalized costs.

16

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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	91	$	91	$	172	$	172
Average number of common shares outstanding — basic	96.9		96.7		96.9		96.7
Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.5		0.4		0.5		0.3
Average number of common shares outstanding — diluted	97.4		97.1		97.4		97.0
Basic Earnings per Common Share	$	0.93	$	0.93	$	1.77	$	1.78
Diluted Earnings per Common Share	$	0.93	$	0.93	$	1.76	$	1.77

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

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 24% and 26% for the three months ended June 30, 2023 and 2022, respectively, and 28% and 25% for the six months ended June 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 ETR for the comparative periods is driven by the remeasurement of state deferred taxes.

17

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:

	June 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)	$	19	$	—	$	19	$	—	$	—	$	—	$	—	$	—
Long-term notes receivable — related party	4		—		—		4		4		—		—		4
Short-term borrowings (a)	100		—		100		—		330		—		330		—
Long-term debt (b)	$	3,062	$	—	$	2,741	$	—	$	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.

18

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 8 — DEBT

Long-Term Debt

DT Midstream's long-term debt outstanding included:

			Maturity	June 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				(3)		(3)
Unamortized debt issuance costs				(34)		(37)
Long-term debt				$	3,062	$	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.

(c) Variable rate is SOFR plus 2.11% for a one-month interest period as of June 30, 2023.

(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:

	June 30,
	2023
	(millions)
Total availability
Revolving Credit Facility, expiring October 2027	$	1,000
Amounts outstanding
Revolving Credit Facility borrowings	100
Letters of credit	16
	116
Net availability	$	884

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. During the three months ended June 30, 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 June 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.

On June 27, 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).

19

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

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. 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 June 30, 2023, the debt service coverage ratio, the consolidated net leverage ratio and the interest coverage ratio was 8.6 to 1, 2.4 to 1 and 8.2 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 June 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 June 30, 2023 is $31 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 June 30, 2023 is USD $53 million. The funding of a loan under the terms of the credit facility is considered remote.

20

DT Midstream, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

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. Slope restoration expenditures are typically capital in nature. As of both June 30, 2023 and December 31, 2022, DT Midstream had accrued contingent liabilities of $19 million for future slope restoration expenditures. The accrual is included in Other current liabilities and Other liabilities in the Consolidated Statements of Financial Position. DT Midstream believes the accrued amounts are sufficient to cover estimated future expenditures.

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 six months ended June 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 six months ended June 30, 2023 and 2022.

The following table presents financial data by business segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Operating Revenues
Pipeline	$	90	$	83	$	175	$	160
Gathering	134		144		269		282
Total	$	224	$	227	$	444	$	442

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	52	$	121	$	100
Gathering	27		39		51		72
Total	$	91	$	91	$	172	$	172

NOTE 11 — SUBSEQUENT EVENT

Dividend Declaration

On August 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 September 18, 2023 and is expected to be paid on October 15, 2023.

21

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.

22

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 June 30, 2023 to the three months ended March 31, 2023, and the six months ended June 30, 2023 to the six months ended June 30, 2022, as applicable.

The following table summarizes our consolidated financial results:

	Three Months Ended				Six Months Ended
	June 30,		March 31,		June 30,		June 30,
	2023		2023		2023		2022
	(millions, except per share amounts)
Operating revenues	$	224	$	220	$	444	$	442
Net Income Attributable to DT Midstream	91		81		172		172
Diluted Earnings per Common Share	$	0.93	$	0.84	$	1.76	$	1.77

	Three Months Ended				Six Months Ended
	June 30,		March 31,		June 30,		June 30,
	2023		2023		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	57	$	121	$	100
Gathering	27		24		51		72
Total	$	91	$	81	$	172	$	172

23

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 six months ended June 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				Six Months Ended
	June 30,		March 31,		June 30,		June 30,
	2023		2023		2023		2022
	(millions)
Operating revenues	$	90	$	85	$	175	$	160
Operation and maintenance	14		11		25		25
Depreciation and amortization	17		16		33		31
Taxes other than income	3		4		7		8
Asset (gains) losses and impairments, net	(3)		—		(3)		(6)
Operating Income	59		54		113		102
Interest expense	13		16		29		26
Interest income	(1)		—		(1)		—
Earnings from equity method investees	(41)		(50)		(91)		(71)
Loss from financing activities	—		—		—		6
Income Tax Expense	21		28		49		35
Net Income	67		60		127		106
Less: Net Income Attributable to Noncontrolling Interests	3		3		6		6
Net Income Attributable to DT Midstream	$	64	$	57	$	121	$	100

Operating revenues increased $5 million for the three months ended June 30, 2023 primarily due to new transmission service contracts at the Michigan System of $2 million, higher estimated recovery of operational flow order fees of $2 million which is offset in operation and maintenance expense, and higher rates on new long-term storage contracting of $3 million partially offset by lower capacity revenues in short-term contracting of $2 million at the Washington 10 Storage Complex. Operating revenues increased $15 million for the six months ended June 30, 2023 primarily due to higher long-term and short-term storage contracting rates at the Washington 10 Storage Complex of $10 million and new transmission service contracts at the Michigan System of $7 million, partially offset by lower volumes at Bluestone.

Operation and maintenance expense increased $3 million for the three months ended June 30, 2023 primarily due to higher operational flow order fees.

Asset (gains) losses and impairments, net increased $3 million for the three months ended June 30, 2023 due to a one-time gain realized from an insurance settlement that occurred during the three months ended June 30, 2023. Asset (gains) losses and impairments, net decreased $3 million for the six months ended June 30, 2023. The decrease was due to the 2023 gain of $3 million mentioned above as compared to the 2022 gain of $6 million from a legal settlement with a supplier.

Interest expense decreased $3 million for the three months ended June 30, 2023 due to lower borrowings under the Revolving Credit Facility. Interest expense increased $3 million for the six months ended June 30, 2023 primarily due to higher borrowings under the Revolving Credit Facility, a full six months of 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 additional construction in progress during 2023.

24

Earnings from equity method investees decreased $9 million for the three months ended June 30, 2023 primarily due to higher interest expense driven by new senior unsecured notes at NEXUS of $4 million and lower revenues at Millennium of $4 million. Millennium had higher seasonal short-term contracting revenues during the three months ended March 31, 2023. Earnings from equity method investees increased $20 million for the six months ended June 30, 2023 primarily due to higher earnings from Millennium of $14 million driven by the higher ownership percentage, and increased contract rates and additional customers at NEXUS of $6 million.

Loss from financing activities decreased $6 million for the six months ended June 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 decreased $7 million for the three months ended June 30, 2023 primarily driven by the remeasurement of state deferred taxes that occurred in the three months ended March 31, 2023. Income tax expense increased $14 million for the six months ended June 30, 2023 primarily due to an increase in Income before income taxes and a higher effective tax rate in 2023. See Note 6, "Income Taxes" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

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 on 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				Six Months Ended
	June 30,		March 31,		June 30,		June 30,
	2023		2023		2023		2022
	(millions)
Operating revenues	$	134	$	135	$	269	$	282
Operation and maintenance	46		47		93		99
Depreciation and amortization	27		27		54		53
Taxes other than income	3		5		8		8
Asset (gains) losses and impairments, net	—		—		—		(17)
Operating Income	58		56		114		139
Interest expense	22		22		44		38
Interest income	—		—		—		(1)
Loss from financing activities	—		—		—		7
Other (income) and expense	—		(1)		(1)		—
Income Tax Expense	9		11		20		23
Net Income Attributable to DT Midstream	$	27	$	24	$	51	$	72

Operating revenues decreased $13 million for the six months ended June 30, 2023 primarily due to lower Blue Union revenues of $16 million and lower Susquehanna Gathering System volumes of $3 million, partially offset by higher Appalachia Gathering System volumes of $8 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 $6 million for the six months ended June 30, 2023 primarily due to lower Blue Union expenses of $4 million driven by lower production-related operating expenses and planned maintenance, and lower expenses across other gathering assets.

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

25

Interest expense increased $6 million for the six months ended June 30, 2023 primarily due to higher borrowings under the Revolving Credit Facility, a full six months of 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 additional construction in progress during 2023.

Loss from financing activities decreased $7 million for the six months ended June 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 decreased $3 million for the six months ended June 30, 2023 primarily due to a decrease in Income before income taxes. The decrease was partially offset by an increase in the effective tax rates in 2023. See Note 6, "Income Taxes" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q for further details.

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. DT Midstream has shifted 2024 committed capital into 2023 for a new greenfield gathering opportunity in the emerging Ohio Utica play. 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.

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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.

	Six Months Ended
	June 30,
	2023		2022
	(millions)
Cash and Cash Equivalents at Beginning of Period	$	61	$	132
Net cash and cash equivalents from operating activities	389		379
Net cash and cash equivalents from (used for) investing activities	(31)		(31)
Net cash and cash equivalents from (used for) financing activities	(374)		(135)
Net Increase (Decrease) in Cash and Cash Equivalents	(16)		213
Cash and Cash Equivalents at End of Period	$	45	$	345

For purposes of the following discussion, any increases or decreases refer to the comparison of the six months ended June 30, 2023 to the six months ended June 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, changing commodity prices, 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 $10 million in the six months ended June 30, 2023 primarily due to an increase in dividends received from equity method investees 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 a decrease in working capital changes and 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 was unchanged in the six months ended June 30, 2023 primarily due to an increase in cash used for plant and equipment expenditures for expansions on LEAP, Blue Union, and the Appalachia Gathering System and a decrease in proceeds from the sale of notes receivable, mostly 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 sale of 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.

During the six months ended June 30, 2023 and 2022, DT Midstream paid cash dividends on common stock of $129 million and $120 million, respectively. See Note 5, "Earnings Per Share and Dividends" to the Consolidated Financial Statements under Part I, Item 1 of this Form 10-Q.

27

Net cash and cash equivalents used for financing activities increased $239 million in the six months ended June 30, 2023 primarily due to higher net repayments of borrowings under the Revolving Credit Facility, higher dividends paid on common stock, 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 June 30, 2023, we had $16 million of letters of credit outstanding and $100 million of borrowings outstanding under our Revolving Credit Facility. We had approximately $929 million of available liquidity as of June 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.

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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 estimated 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 (WACC) which is used to discount estimates of projected future results and cash flows to be generated by each reporting unit. We have noted a slight decline in our WACC for each reporting unit since our last annual goodwill 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 decline in our consolidated market capitalization and gathering-related midstream industry 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 estimated 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, a sustained further decline in our market capitalization, or a further 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.

29

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 six months ended June 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 June 30, 2023, we had floating rate debt of $499 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 June 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 June 30, 2023
	(millions)
Interest rate risk	$	(91)	$	96	Long-term debt

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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 June 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 June 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.

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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

32

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:	August 1, 2023
			DT MIDSTREAM, INC.
		By:	/S/ JEFFREY A. JEWELL
			Jeffrey A. Jewell Chief Financial and Accounting Officer
			(Duly Authorized Officer)

33

EX-31.1

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:	August 1, 2023
David J. Slater President and Chief Executive Officer of DT Midstream, Inc.

EX-31.2

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.;

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

EX-32.1

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 year ended June 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:	August 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.

EX-32.2

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 year ended June 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:	August 1, 2023	/S/ JEFFREY A. JEWELL
		Jeffrey A. Jewell Chief Financial 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.

EX-95.1

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.

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 June 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 June 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	—	—	—	—	—	$	1,001	—	No	No	—	—	—
Total	—	—	—	—	—	$	1,001	—	No	No	—	—	—

(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 MSHA on or before June 30, 2023 regardless of whether the assessment has been challenged or appealed, for alleged violations occurring during the three months ended June 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.

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Cover	6 Months Ended
	Jun. 30, 2023 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 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	96,902,277
Entity Central Index Key	0001842022
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false

XML

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Operating revenues	$ 224	$ 227	$ 444	$ 442
Operating Expenses
Operation and maintenance	60	63	118	124
Depreciation and amortization	44	42	87	84
Taxes other than income	6	8	15	16
Asset (gains) losses and impairments, net	(3)	(23)	(3)	(23)
Operating Income	117	137	227	241
Other (Income) and Deductions
Interest expense	35	33	73	64
Interest income	(1)	(1)	(1)	(1)
Earnings from equity method investees	(41)	(35)	(91)	(71)
Loss from financing activities	0	13	0	13
Other (income) and expense	0	0	(1)	0
Income Before Income Taxes	124	127	247	236
Income Tax Expense	30	33	69	58
Net Income	94	94	178	178
Less: Net Income Attributable to Noncontrolling Interests	3	3	6	6
Net Income Attributable to DT Midstream	$ 91	$ 91	$ 172	$ 172
Basic Earnings per Common Share
Net Income Attributable to DT Midstream (in dollars per share)	$ 0.93	$ 0.93	$ 1.77	$ 1.78
Diluted Earnings per Common Share
Net Income Attributable to DT Midstream (in dollars per share)	$ 0.93	$ 0.93	$ 1.76	$ 1.77
Weighted Average Common Shares Outstanding
Basic (in shares)	96.9	96.7	96.9	96.7
Diluted (in shares)	97.4	97.1	97.4	97.0

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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 94	$ 94	$ 178	$ 178
Foreign currency translation and unrealized gain on derivatives, net of tax	0	1	1	1
Other comprehensive income	0	1	1	1
Comprehensive income	94	95	179	179
Less: Comprehensive income attributable to noncontrolling interests	3	3	6	6
Comprehensive Income Attributable to DT Midstream	$ 91	$ 92	$ 173	$ 173

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Consolidated Statements of Financial Position - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 45	$ 61
Accounts receivable (net of $— allowance for expected credit loss for each period end)	144	161
Deferred property taxes	11	22
Prepaid expenses and other	10	18
Total Current Assets	210	262
Investments
Investments in equity method investees	1,789	2,200
Property
Property, plant, and equipment	4,967	4,534
Accumulated depreciation	(786)	(728)
Net Property, plant, and equipment	4,181	3,806
Other Assets
Goodwill	473	473
Long-term notes receivable — related party	4	4
Operating lease right-of-use assets	43	31
Intangible assets, net	1,996	2,025
Other	30	32
Total Other Assets	2,546	2,565
Total Assets	8,726	8,833
Current Liabilities
Accounts payable	125	119
Short-term borrowings	100	330
Operating lease liabilities	16	16
Dividends payable	67	62
Interest payable	10	10
Property taxes payable	22	29
Accrued compensation	10	20
Other	11	28
Total Current Liabilities	361	614
Long-Term Debt	3,062	3,059
Other Liabilities
Deferred income taxes	985	923
Operating lease liabilities	30	19
Other	93	64
Total Other Liabilities	1,108	1,006
Total Liabilities	4,531	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 June 30, 2023 and December 31, 2022)	0	0
Common stock ($0.01 par value, 550,000,000 shares authorized, and 96,902,277 and 96,754,549 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively)	1	1
Additional paid in capital	3,476	3,469
Retained earnings	584	547
Accumulated other comprehensive income (loss)	(9)	(10)
Total DT Midstream Equity	4,052	4,007
Noncontrolling interests	143	147
Total Equity	4,195	4,154
Total Liabilities and Equity	$ 8,726	$ 8,833

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Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Jun. 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)	96,902,277	96,754,549
Common stock, shares outstanding (in shares)	96,902,277	96,754,549

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities
Net Income	$ 178	$ 178
Adjustments to reconcile Net Income to Net cash and cash equivalents from operating activities:
Depreciation and amortization	87	84
Stock-based compensation	10	8
Amortization of operating lease right-of-use assets	9	9
Deferred income taxes	62	48
Earnings from equity method investees	(91)	(71)
Dividends from equity method investees	113	86
Asset (gains) losses and impairments, net	0	(17)
Loss from financing activities	0	13
Changes in assets and liabilities:
Accounts receivable, net	17	32
Accounts payable	(6)	(1)
Interest payable	0	6
Other current and noncurrent assets and liabilities	10	4
Net cash and cash equivalents from operating activities	389	379
Investing Activities
Plant and equipment expenditures	(421)	(55)
Proceeds from sale of notes receivable	0	22
Distributions from equity method investees	396	2
Contributions to equity method investees	(6)	(2)
Notes receivable — third party	0	2
Net cash and cash equivalents from (used for) investing activities	(31)	(31)
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	305	0
Repayment of borrowings under the Revolving Credit Facility	(535)	0
Repurchase of common stock	0	(3)
Distributions to noncontrolling interests	(10)	(7)
Dividends paid on common stock	(129)	(120)
Other financing activities	(5)	0
Net cash and cash equivalents from (used for) financing activities	(374)	(135)
Net Increase (Decrease) in Cash and Cash Equivalents	(16)	213
Cash and Cash Equivalents at Beginning of Period	61	132
Cash and Cash Equivalents at End of Period	45	345
Supplemental disclosure of cash information
Interest, net of interest capitalized	69	55
Income taxes	18	7
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable and other accruals	$ 111	$ 20

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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	178
Other comprehensive income, net of tax	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
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
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	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	178
Other comprehensive income, net of tax	$ 1
Ending Balance (in shares) at Jun. 30, 2023	96,902,277	96,902,000
Ending Balance at Jun. 30, 2023	$ 4,195	$ 1	3,476	584	(9)	143
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	5		6	(1)
Other comprehensive income, net of tax	$ 0
Ending Balance (in shares) at Jun. 30, 2023	96,902,277	96,902,000
Ending Balance at Jun. 30, 2023	$ 4,195	$ 1	$ 3,476	$ 584	$ (9)	$ 143

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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	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	$ 0.64	$ 0.64	$ 0.64	$ 0.64

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Description of the Business and Basis of Presentation

6 Months Ended

Jun. 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

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 June 30, 2023, results of operations for the three and six months ended June 30, 2023 and 2022, statement of changes in stockholders' equity for the three and six months ended June 30, 2023 and 2022, and cash flows for the six months ended June 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.

The following table summarizes the major line items in the Consolidated Statements of Financial Position for consolidated VIEs as of June 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:

	June 30,		December 31,
	2023		2022
	(millions)
ASSETS (a)
Cash	$	12	$	27
Accounts receivable	9		9
Other current assets	1		3
Intangible assets, net	490		498
Property, plant and equipment, net	397		403
Goodwill	25		25
	$	934	$	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 June 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 $360 million and $368 million, respectively. The difference will be amortized over the life of the underlying assets. As of June 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 Statement of Cash Flows.

Equity method investees are described below:

	Investments As of				% Owned As of
	June 30,		December 31,		June 30,	December 31,
Equity Method Investee	2023		2022		2023	2022
	(millions)
NEXUS	$	915	$	1,313	50%	50%
Vector	137		135		40%	40%
Millennium	737		752		52.5%	52.5%
Total investments in equity method investees	$	1,789	$	2,200

During the three months ended June 30, 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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Operating revenues	$	199	$	191	$	410	$	389
Operating expenses	94		94		188		188
Net Income	$	91	$	89	$	201	$	184

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Significant Accounting Policies

6 Months Ended

Jun. 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 June 30, 2023. As of June 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 June 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 six months ended June 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 June 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.

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New Accounting Pronouncements

6 Months Ended

Jun. 30, 2023

Accounting Standards Update and Change in Accounting Principle [Abstract]

New Accounting Pronouncements

NEW ACCOUNTING PRONOUNCEMENTS

Recently Adopted Pronouncements

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting, as amended. Subsequently, in January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848) - Scope, as amended. The amendments in these updates provide optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The guidance can be applied prospectively from any date beginning March 12, 2020 through December 31, 2022. Subsequently, in December 2022, the FASB issued ASU No. 2022-06, Deferral of the Sunset Date of Topic 848, which further deferred the sunset date to December 31, 2024. The optional relief is temporary and cannot be applied to contract modifications and hedging relationships entered into or evaluated after December 31, 2024. DT Midstream adopted this standard in 2022, which did not have a material impact on our Consolidated Financial Statements.

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Goodwill

6 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

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 six months ended June 30, 2023.

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

	June 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 estimated 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, a sustained further decline in our market capitalization, or a further decline in midstream industry transaction multiples, this may lead to a goodwill impairment in the future.

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Revenue

6 Months Ended

Jun. 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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Pipeline (a)	$	90	$	83	$	175	$	160
Gathering	134		144		269		282
Total operating revenues	$	224	$	227	$	444	$	442

__________________________________

(a)Includes revenues outside the scope of Topic 606 primarily related to contracts accounted for as leases of $2 million for both the three months ended June 30, 2023 and 2022, and $3 million and $4 million for the six months ended June 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	29
Revenue recognized that was included in the balance at the beginning of the period	(2)
Balance as of June 30	$	59

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.

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

	(millions)
Remainder of 2023	$	2
2024	7
2025	7
2026	7
2027	8
2028 and thereafter	28
Total	$	59

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 June 30, 2023 that are expected to be recognized as revenue in future periods:

	(millions)
Remainder of 2023	$	53
2024	129
2025	133
2026	103
2027	71
2028 and thereafter	247
Total	$	736

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 June 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 six months ended June 30, 2023 and 2022, we recognized approximately $1 million of amortization expense related to such capitalized costs.

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Earnings Per Share and Dividends

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Earnings Per Share and Dividends

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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	91	$	91	$	172	$	172
Average number of common shares outstanding — basic	96.9		96.7		96.9		96.7
Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.5		0.4		0.5		0.3
Average number of common shares outstanding — diluted	97.4		97.1		97.4		97.0
Basic Earnings per Common Share	$	0.93	$	0.93	$	1.77	$	1.78
Diluted Earnings per Common Share	$	0.93	$	0.93	$	1.76	$	1.77

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

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Income Taxes

6 Months Ended

Jun. 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 24% and 26% for the three months ended June 30, 2023 and 2022, respectively, and 28% and 25% for the six months ended June 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 ETR for the comparative periods is driven by the remeasurement of state deferred taxes.

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Fair Value

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value

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:

	June 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)	$	19	$	—	$	19	$	—	$	—	$	—	$	—	$	—
Long-term notes receivable — related party	4		—		—		4		4		—		—		4
Short-term borrowings (a)	100		—		100		—		330		—		330		—
Long-term debt (b)	$	3,062	$	—	$	2,741	$	—	$	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.

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Debt

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Debt

DEBT

Long-Term Debt

DT Midstream's long-term debt outstanding included:

			Maturity	June 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				(3)		(3)
Unamortized debt issuance costs				(34)		(37)
Long-term debt				$	3,062	$	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.

(c) Variable rate is SOFR plus 2.11% for a one-month interest period as of June 30, 2023.

(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:

	June 30,
	2023
	(millions)
Total availability
Revolving Credit Facility, expiring October 2027	$	1,000
Amounts outstanding
Revolving Credit Facility borrowings	100
Letters of credit	16
	116
Net availability	$	884

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. During the three months ended June 30, 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 June 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.

On June 27, 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. 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 June 30, 2023, the debt service coverage ratio, the consolidated net leverage ratio and the interest coverage ratio was 8.6 to 1, 2.4 to 1 and 8.2 to 1, respectively, and DT Midstream was in compliance with these financial covenants.

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Commitments and Contingencies

6 Months Ended

Jun. 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 June 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 June 30, 2023 is $31 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 June 30, 2023 is USD $53 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. Slope restoration expenditures are typically capital in nature. As of both June 30, 2023 and December 31, 2022, DT Midstream had accrued contingent liabilities of $19 million for future slope restoration expenditures. The accrual is included in Other current liabilities and Other liabilities in the Consolidated Statements of Financial Position. DT Midstream believes the accrued amounts are sufficient to cover estimated future expenditures.

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Segment and Related Information

6 Months Ended

Jun. 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 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 six months ended June 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 six months ended June 30, 2023 and 2022.

The following table presents financial data by business segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Operating Revenues
Pipeline	$	90	$	83	$	175	$	160
Gathering	134		144		269		282
Total	$	224	$	227	$	444	$	442

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	52	$	121	$	100
Gathering	27		39		51		72
Total	$	91	$	91	$	172	$	172

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Subsequent Event

6 Months Ended

Jun. 30, 2023

Subsequent Events [Abstract]

Subsequent Event

SUBSEQUENT EVENT

Dividend Declaration

On August 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 September 18, 2023 and is expected to be paid on October 15, 2023.

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Significant Accounting Policies (Policies)

6 Months Ended

Jun. 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 June 30, 2023, results of operations for the three and six months ended June 30, 2023 and 2022, statement of changes in stockholders' equity for the three and six months ended June 30, 2023 and 2022, and cash flows for the six months ended June 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 June 30, 2023. As of June 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 June 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.

Recently Issued Pronouncements

Recently Adopted Pronouncements

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting, as amended. Subsequently, in January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848) - Scope, as amended. The amendments in these updates provide optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The guidance can be applied prospectively from any date beginning March 12, 2020 through December 31, 2022. Subsequently, in December 2022, the FASB issued ASU No. 2022-06, Deferral of the Sunset Date of Topic 848, which further deferred the sunset date to December 31, 2024. The optional relief is temporary and cannot be applied to contract modifications and hedging relationships entered into or evaluated after December 31, 2024. DT Midstream adopted this standard in 2022, which did not have a material impact on our Consolidated Financial Statements.

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Description of the Business and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

The following table summarizes the major line items in the Consolidated Statements of Financial Position for consolidated VIEs as of June 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:

	June 30,		December 31,
	2023		2022
	(millions)
ASSETS (a)
Cash	$	12	$	27
Accounts receivable	9		9
Other current assets	1		3
Intangible assets, net	490		498
Property, plant and equipment, net	397		403
Goodwill	25		25
	$	934	$	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
	June 30,		December 31,		June 30,	December 31,
Equity Method Investee	2023		2022		2023	2022
	(millions)
NEXUS	$	915	$	1,313	50%	50%
Vector	137		135		40%	40%
Millennium	737		752		52.5%	52.5%
Total investments in equity method investees	$	1,789	$	2,200

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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Operating revenues	$	199	$	191	$	410	$	389
Operating expenses	94		94		188		188
Net Income	$	91	$	89	$	201	$	184

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Goodwill (Tables)

6 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

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

	June 30,		December 31,
	2023		2022
	(millions)
Pipeline	$	53	$	53
Gathering	420		420
Total goodwill	$	473	$	473

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Revenue (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following is a summary of revenues disaggregated by segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Pipeline (a)	$	90	$	83	$	175	$	160
Gathering	134		144		269		282
Total operating revenues	$	224	$	227	$	444	$	442

__________________________________

(a)Includes revenues outside the scope of Topic 606 primarily related to contracts accounted for as leases of $2 million for both the three months ended June 30, 2023 and 2022, and $3 million and $4 million for the six months ended June 30, 2023 and 2022, respectively.

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	29
Revenue recognized that was included in the balance at the beginning of the period	(2)
Balance as of June 30	$	59

Revenue Expected to be Recognized in Future Periods

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

	(millions)
Remainder of 2023	$	2
2024	7
2025	7
2026	7
2027	8
2028 and thereafter	28
Total	$	59

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

	(millions)
Remainder of 2023	$	53
2024	129
2025	133
2026	103
2027	71
2028 and thereafter	247
Total	$	736

XML

Earnings Per Share and Dividends (Tables)

6 Months Ended

Jun. 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				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	91	$	91	$	172	$	172
Average number of common shares outstanding — basic	96.9		96.7		96.9		96.7
Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.5		0.4		0.5		0.3
Average number of common shares outstanding — diluted	97.4		97.1		97.4		97.0
Basic Earnings per Common Share	$	0.93	$	0.93	$	1.77	$	1.78
Diluted Earnings per Common Share	$	0.93	$	0.93	$	1.76	$	1.77

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

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Fair Value (Tables)

6 Months Ended

Jun. 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:

	June 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)	$	19	$	—	$	19	$	—	$	—	$	—	$	—	$	—
Long-term notes receivable — related party	4		—		—		4		4		—		—		4
Short-term borrowings (a)	100		—		100		—		330		—		330		—
Long-term debt (b)	$	3,062	$	—	$	2,741	$	—	$	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.

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Debt (Tables)

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Outstanding

DT Midstream's long-term debt outstanding included:

			Maturity	June 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				(3)		(3)
Unamortized debt issuance costs				(34)		(37)
Long-term debt				$	3,062	$	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.

(c) Variable rate is SOFR plus 2.11% for a one-month interest period as of June 30, 2023.

(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:

	June 30,
	2023
	(millions)
Total availability
Revolving Credit Facility, expiring October 2027	$	1,000
Amounts outstanding
Revolving Credit Facility borrowings	100
Letters of credit	16
	116
Net availability	$	884

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Segment and Related Information (Tables)

6 Months Ended

Jun. 30, 2023

Segment Reporting [Abstract]

Schedule of Financial Data by Business Segment

The following table presents financial data by business segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Operating Revenues
Pipeline	$	90	$	83	$	175	$	160
Gathering	134		144		269		282
Total	$	224	$	227	$	444	$	442

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2023		2022		2023		2022
	(millions)
Net Income Attributable to DT Midstream by Segment
Pipeline	$	64	$	52	$	121	$	100
Gathering	27		39		51		72
Total	$	91	$	91	$	172	$	172

XML

Description of the Business and Basis of Presentation (Narrative) (Details)	1 Months Ended	3 Months Ended	6 Months Ended
	Oct. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)	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		$ 360,000,000	$ 360,000,000		$ 368,000,000
Undistributed earnings from equity method investments		0	0		$ 43,000,000
Payments to acquire equity method investments			6,000,000	$ 2,000,000
NEXUS Senior Unsecured Notes | Senior Notes
Related Party Transaction [Line Items]
Long-term debt issued		$ 750,000,000	$ 750,000,000
Interest Rate		5.52%	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%		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%

XML

Description of the Business and Basis of Presentation (Consolidated VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
ASSETS
Cash	$ 45	$ 61
Accounts receivable	144	161
Intangible assets, net	1,996	2,025
Property, plant and equipment, net	4,181	3,806
Goodwill	473	473
Total Assets	8,726	8,833
LIABILITIES
Other noncurrent liabilities	1,108	1,006
Total Liabilities	4,531	4,679
Variable interest entity, primary beneficiary
ASSETS
Cash	12	27
Accounts receivable	9	9
Other current assets	1	3
Intangible assets, net	490	498
Property, plant and equipment, net	397	403
Goodwill	25	25
Total Assets	934	965
LIABILITIES
Accounts payable and other current liabilities	2	4
Other noncurrent liabilities	4	4
Total Liabilities	$ 6	$ 8

XML

Description of the Business and Basis of Presentation (Equity Method Investees) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Oct. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investments As of	$ 1,789	$ 2,200
NEXUS
Schedule of Equity Method Investments [Line Items]
Investments As of	$ 915	$ 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	$ 737	$ 752
% Owned As of	52.50%	52.50%	52.50%

XML

Description of the Business and Basis of Presentation (Summarized Income Statement Data) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 224		$ 227		$ 444	$ 442
Net Income	94	$ 84	94	$ 84	178	178
Equity method investment, non-consolidated investees
Schedule of Equity Method Investments [Line Items]
Operating revenues	199		191		410	389
Operating expenses	94		94		188	188
Net Income	$ 91		$ 89		$ 201	$ 184

XML

Significant Accounting Policies (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) internal_grade	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) internal_grade	Jun. 30, 2022 USD ($)	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

XML

Goodwill (Details) - USD ($) $ in Millions	Jun. 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

XML

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 224	$ 227	$ 444	$ 442
Pipeline
Disaggregation of Revenue [Line Items]
Total operating revenues	90	83	175	160
Lease revenue outside scope of Topic 606	2	2	3	4
Gathering
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 134	$ 144	$ 269	$ 282

XML

Revenue (Contract Liabilities) (Details) $ in Millions	6 Months Ended
	Jun. 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	29
Revenue recognized that was included in the balance at the beginning of the period	(2)
Ending Balance	$ 59

XML

Revenue (Expected Recognition of Contract Liabilities) (Details) $ in Millions	Jun. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 59
Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	736
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2
Remaining performance obligation, expected timing of satisfaction	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01 | Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 53
Remaining performance obligation, expected timing of satisfaction	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | 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]: 2025-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | 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]: 2026-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | 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]: 2027-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 8
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | 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]: 2028-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 28
Remaining performance obligation, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-07-01 | Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 247
Remaining performance obligation, expected timing of satisfaction

XML

Revenue (Expected Timing of Performance Obligation Satisfaction Related to Fixed Consideration) (Details) $ in Millions	Jun. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 59
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 2
Remaining performance obligation, expected timing of satisfaction	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 8
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 28
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 736
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 53
Remaining performance obligation, expected timing of satisfaction	6 months
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
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]: 2025-07-01
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]: 2026-07-01
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]: 2027-07-01
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]: 2028-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 247
Remaining performance obligation, expected timing of satisfaction

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Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 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

XML

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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$ 91	$ 91	$ 172	$ 172
Average number of common shares outstanding — basic (in shares)	96.9	96.7	96.9	96.7
Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards (in shares)	0.5	0.4	0.5	0.3
Average number of common shares outstanding — diluted (in shares)	97.4	97.1	97.4	97.0
Basic earnings per common share (in dollars per share)	$ 0.93	$ 0.93	$ 1.77	$ 1.78
Diluted earnings per common share (in dollars per share)	$ 0.93	$ 0.93	$ 1.76	$ 1.77

XML

Earnings Per Share and Dividends (Dividends Declared) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	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	$ 0.64	$ 0.64	$ 0.64	$ 0.64
Dividend Amount	$ 67	$ 67	$ 62	$ 62	$ 62	$ 62

XML

Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Estimated annual effective tax rate	24.00%	26.00%	28.00%	25.00%

XML

Fair Value (Details) - USD ($) $ in Millions	Jun. 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	100	330
Long-term debt	3,062	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	19	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	100	330
Long-term debt	2,741	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	19	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

XML

Debt (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Line Of Credit Facility [Line Items]
Debt amendment cost		$ 8
Debt service coverage ratio	8.6
Consolidated net leverage ratio	2.4
Interest coverage ratio	8.2
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

XML

Debt (Long-term Debt Outstanding) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt principal	$ 3,099	$ 3,099
Unamortized debt discount	(3)	(3)
Unamortized debt issuance costs	(34)	(37)
Long-term debt	$ 3,062	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%

XML

Debt (Availability Under the Revolving Credit Facility) (Details) - Revolving Credit Facility, expiring October 2027 $ in Millions	Jun. 30, 2023 USD ($)
Line Of Credit Facility [Line Items]
Amounts outstanding	$ 116
Net availability	884
Revolving Credit Facility
Line Of Credit Facility [Line Items]
Total availability	1,000
Amounts outstanding	100
Letter of credit
Line Of Credit Facility [Line Items]
Amounts outstanding	$ 16

XML

Commitments and Contingencies (Narrative) (Details) $ in Millions, $ in Millions	Jun. 30, 2023 USD ($)	Jun. 30, 2023 CAD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Accrued contingent liabilities	$ 19		$ 19
Performance surety bonds
Loss Contingencies [Line Items]
Guarantee value				$ 31
Revolving Term Credit Facility | Vector
Loss Contingencies [Line Items]
Maximum potential payout under line of credit	$ 53
Financing receivables		$ 70

XML

Segment and Related Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	$ 224	$ 227	$ 444	$ 442
Net Income Attributable to DT Midstream	91	91	172	172
Pipeline
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	90	83	175	160
Net Income Attributable to DT Midstream	64	52	121	100
Gathering
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	134	144	269	282
Net Income Attributable to DT Midstream	$ 27	$ 39	$ 51	$ 72

XML

Subsequent Event (Details) - $ / shares		3 Months Ended
	Aug. 01, 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	$ 0.64	$ 0.64	$ 0.64	$ 0.64
Subsequent Event
Subsequent Event [Line Items]
Dividends declared on common stock (in dollars per share)	$ 0.69