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Partners' Capital and Distributions - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended				9 Months Ended
	Jan. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jan. 30, 2025
Partners' Capital and Distributions [Line Items]
Payments for repurchase of preferred stock and preference stock						$ 333	$ 0
Permian JV
Partners' Capital and Distributions [Line Items]
Noncontrolling interests in subsidiaries (as a percent)		35.00%				35.00%
Cactus II
Partners' Capital and Distributions [Line Items]
Noncontrolling interests in subsidiaries (as a percent)		30.00%				30.00%
Red River
Partners' Capital and Distributions [Line Items]
Noncontrolling interests in subsidiaries (as a percent)		33.00%				33.00%
Series A Preferred Units
Partners' Capital and Distributions [Line Items]
Repurchase and cancellation of common units under the common equity repurchase program (units)	12,700,000		0	12,678,560
Shares issued, price per share (in dollars per unit)	$ 26.25
Payments for repurchase of preferred stock and preference stock	$ 333
Preferred stock redemption		$ 0			$ 0	$ 43	$ 0
Number of days after end of quarter within which distributions must be paid to unitholders						45 days
Series A Preferred Units | Other current liabilities
Partners' Capital and Distributions [Line Items]
Amount accrued to distributions payable								$ 10

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