Derivative Assets And Liabilities Partnership's Derivative Assets And Liabilities, Amount Of Gain/(Loss) Reclassified From AOCI Into Income (Effective Portion) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (212)	$ (81)
Losses on interest rate derivatives	(329)	(74)	[1]
Commodity Derivatives - Trading [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	5	5
Commodity derivatives
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 112	$ (12)

[1] *As adjusted. See Note 1.