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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 | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Amount of Gain/(Loss) Recognized in Income on Derivatives |  | $ 10 | $ 157 | $ 114 | $ 154
Gain (loss) on interest rate derivative | [1] | 0 | (6) | 0 | 6
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net |  | $ 10 | $ 163 | $ 114 | $ 148
[1] | This interest rate derivative was terminated by USAC in August 2024.

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