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New Accounting Pronouncements
 3 Months Ended
Mar. 31, 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.