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Subsequent Event	3 Months Ended
	Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENT NEXUS Financing On April 6, 2023, NEXUS priced $750 million of senior unsecured notes with a weighted-average coupon rate of 5.52%. On April 28, 2023, NEXUS closed the notes offering, and by mid-May DT Midstream will receive a distribution from NEXUS for $375 million, less fees and expenses. DT Midstream intends to use the proceeds from the distribution to fund organic growth and repay borrowings outstanding under our Revolving Credit Facility.

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No definition available.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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