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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
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Amount of Gain/(Loss) Recognized in Income on Derivatives $ (151) $ 69 $ (409) $ (192)
Gains (losses) on interest rate derivatives (175) 45 (371) 117
Commodity Derivatives [Member]        
Gain (Loss) on Components Excluded from Assessment of Price Risk Hedge Effectiveness 0 0 0 9
Amount of Gain/(Loss) Recognized in Income on Derivatives 21 21 (53) (345)
Commodity Derivatives - Trading [Member]        
Amount of Gain/(Loss) Recognized in Income on Derivatives $ 3 $ 3 $ 15 $ 36