COMMITMENTS AND CONTINGENCIES	6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES From time to time, we are 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. We cannot predict the final disposition of such proceedings. We regularly review legal matters and record 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 our business, financial condition and results of operations. Guarantees In certain limited circumstances, we enter into contractual guarantees. We may guarantee another entity's obligation in the event it fails to perform and may provide guarantees in certain indemnification agreements. We did not have any guarantees of other parties' obligations as of June 30, 2025. Surety Bonds In certain limited circumstances, we enter into contracts that require us to obtain external surety bonds to secure our payment and performance. We agree 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, we would be obligated to reimburse the issuer of the surety bond. In February 2025, certain surety bonds valued at $21 million were terminated. The maximum potential indemnification under our surety bond agreements as of June 30, 2025 is $11 million. Vector Line of Credit We are the lender under a revolving term credit facility to Vector, the borrower, in the amount of CAD $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, 2025 is USD $51 million. The funding of a loan under the terms of the revolving term credit facility is considered remote. Clean Fuels Gathering Contingent Payments A gas supply agreement at Clean Fuels Gathering requires contingent payments from DT Midstream of up to $34 million upon the completion of certain milestones, including cumulative production and income tax credits, and variable payments under a sharing mechanism that could be material. As of June 30, 2025, one milestone had been achieved related to verification of gas production volumes and $10 million was paid and recorded as a prepaid asset. The remaining unamortized prepaid asset is $1 million and $8 million in current and long-term other assets, respectively, in DT Midstream's Consolidated Statements of Financial Position as of June 30, 2025. Contingent Liability In order to comply with certain state environmental regulations, we have 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. We completed evaluations of all locations, which were prioritized based on the severity and proximity of the slope failures, and used updated cost information to assess the adequacy of the estimate for the contingent liability accrual. As of both June 30, 2025 and December 31, 2024, we had accrued contingent liabilities of $3 million for future slope restoration expenditures. The accrual is included in other current liabilities and other liabilities in the Consolidated Statements of Financial Position. While restoration is ongoing, we believe the accrued amounts are sufficient to cover estimated future expenditures.

COMMITMENTS AND CONTINGENCIES

6 Months Ended

Jun. 30, 2025

Commitments and Contingencies Disclosure [Abstract]

From time to time, we are 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. We cannot predict the final disposition of such proceedings. We regularly review legal matters and record 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 our business, financial condition and results of operations.

Guarantees

In certain limited circumstances, we enter into contractual guarantees. We may guarantee another entity's obligation in the event it fails to perform and may provide guarantees in certain indemnification agreements. We did not have any guarantees of other parties' obligations as of June 30, 2025.

Surety Bonds

In certain limited circumstances, we enter into contracts that require us to obtain external surety bonds to secure our payment and performance. We agree 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, we would be obligated to reimburse the issuer of the surety bond. In February 2025, certain surety bonds valued at $21 million were terminated. The maximum potential indemnification under our surety bond agreements as of June 30, 2025 is $11 million.

Vector Line of Credit

We are the lender under a revolving term credit facility to Vector, the borrower, in the amount of CAD $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, 2025 is USD $51 million. The funding of a loan under the terms of the revolving term credit facility is considered remote.

Clean Fuels Gathering Contingent Payments

A gas supply agreement at Clean Fuels Gathering requires contingent payments from DT Midstream of up to $34 million upon the completion of certain milestones, including cumulative production and income tax credits, and variable payments under a sharing mechanism that could be material. As of June 30, 2025, one milestone had been achieved related to verification of gas production volumes and $10 million was paid and recorded as a prepaid asset. The remaining unamortized prepaid asset is $1 million and $8 million in current and long-term other assets, respectively, in DT Midstream's Consolidated Statements of Financial Position as of June 30, 2025.

Contingent Liability

In order to comply with certain state environmental regulations, we have 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. We completed evaluations of all locations, which were prioritized based on the severity and proximity of the slope failures, and used updated cost information to assess the adequacy of the estimate for the contingent liability accrual. As of both June 30, 2025 and December 31, 2024, we had accrued contingent liabilities of $3 million for future slope restoration expenditures. The accrual is included in other current liabilities and other liabilities in the Consolidated Statements of Financial Position. While restoration is ongoing, we believe the accrued amounts are sufficient to cover estimated future expenditures.