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			6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2020	Jun. 30, 2019
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (104)	$ (171)		$ (224)	$ (251)
Losses on interest rate derivatives	(3)	(122)	[1]	(332)	(196)	[1]
Commodity Derivatives - Trading [Member]
Amount of Gain (Loss) Recognized in Income on Derivatives	(5)	(20)		11	(14)
Commodity derivatives
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (96)	$ (29)		$ 97	$ (41)

[1] *As adjusted. See Note 1.