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UNCONSOLIDATED AFFILIATES - Schedule of Equity in Net Earnings from Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	$ 81	$ 88	$ 189	$ 164
Northern Border
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	20	22	48	47
Overland Pass
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	20	23	46	38
Saddlehorn
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	13	13	26	23
BridgeTex
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	6	11	22	18
Roadrunner
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	11	10	21	21
Other
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	$ 11	$ 9	$ 26	$ 17

X

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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