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SEGMENT AND RELATED INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	$ 244	$ 224	$ 484	$ 444
Net Income Attributable to DT Midstream	96	91	193	172
Pipeline
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	109	90	216	175
Net Income Attributable to DT Midstream	71	64	145	121
Gathering
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	135	134	268	269
Net Income Attributable to DT Midstream	$ 25	$ 27	$ 48	$ 51

X

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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