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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
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Mar. 31, 2021 | Mar. 31, 2020
Amount of Gain/(Loss) Recognized in Income on Derivatives | $ 155 | $ (212)
Gains (losses) on interest rate derivatives | 194 | (329)
Commodity Derivatives [Member] |  |
Amount of Gain/(Loss) Recognized in Income on Derivatives | (42) | 112
Commodity Derivatives - Trading [Member] |  |
Amount of Gain/(Loss) Recognized in Income on Derivatives | $ 3 | $ 5

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