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Derivative Assets And Liabilities Table - Partnership's Derivative Assets and Liabilities Amount of Gain (Loss) Recognized (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Amount of Gain/(Loss) Recognized in Income on Derivatives		$ (12)	$ 25
Gain on interest rate derivative	[1]	0	9
Cost of Sales
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		$ (12)	$ 16
[1] This interest rate derivative was terminated by USAC in August 2024.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments.

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