Partners' Capital and Distributions - Consolidated Joint Venture Distributions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Partners' Capital and Distributions [Line Items]
Total distributions paid	$ 431	$ 399	$ 1,304	$ 1,168
Noncontrolling Interests
Partners' Capital and Distributions [Line Items]
Total distributions paid	356	336	1,079	980
Cash Distribution | Noncontrolling Interests | Consolidated Joint Venture Entities
Partners' Capital and Distributions [Line Items]
Total distributions paid	110	113	339	310
Cash Distribution | Noncontrolling Interests | Permian JV
Partners' Capital and Distributions [Line Items]
Total distributions paid	85	87	268	235
Cash Distribution | Noncontrolling Interests | Cactus II
Partners' Capital and Distributions [Line Items]
Total distributions paid	21	20	59	56
Cash Distribution | Noncontrolling Interests | Red River
Partners' Capital and Distributions [Line Items]
Total distributions paid	$ 4	$ 6	$ 12	$ 19