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UNCONSOLIDATED AFFILIATES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) unconsolidated_affiliate	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2024
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated affiliates | unconsolidated_affiliate	3
Investments in unconsolidated affiliates	$ 2,316	$ 1,874	$ 802
Equity method goodwill	368	148
Equity in net earnings from investments	439	202	148
Incurred expenses	254	132	83
Purchases of and contributions to unconsolidated affiliates (Note O)	$ 111	207	3
Overland Pass
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	50.00%
Investments in unconsolidated affiliates	$ 400	402
Equity in net earnings from investments	$ 86	56	33
Saddlehorn
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	40.00%			40.00%
Investments in unconsolidated affiliates	$ 373	288
Equity method investment, additional ownership percentage acquired				10.00%
Equity in net earnings from investments	$ 50	10	0
Northern Border
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	50.00%
Investments in unconsolidated affiliates	$ 333	338
Equity in net earnings from investments	$ 95	75	71
Purchases of and contributions to unconsolidated affiliates (Note O)		91
BridgeTex
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	30.00%
Investments in unconsolidated affiliates	$ 250	193
Equity in net earnings from investments	$ 127	(1)	0
Matterhorn
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	15.00%
Investments in unconsolidated affiliates	$ 248	0
Equity in net earnings from investments	$ 8	0	0
MVP
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	25.00%
Investments in unconsolidated affiliates	$ 235	241
Equity in net earnings from investments	$ 14	4	0
Roadrunner
Schedule of Equity Method Investments [Line Items]
Net ownership percentage	50.00%
Investments in unconsolidated affiliates	$ 183	188
Equity in net earnings from investments	40	43	37
Purchases of and contributions to unconsolidated affiliates (Note O)		105
Other
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	294	224
Equity in net earnings from investments	$ 19	$ 15	$ 7

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