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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 84	$ 84
Foreign currency translation and unrealized gain on derivatives, net of tax	1	0
Other comprehensive income	1	0
Comprehensive income	85	84
Less: Comprehensive income attributable to noncontrolling interests	3	3
Comprehensive Income Attributable to DT Midstream	$ 82	$ 81

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