Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (964)	$ 1,118
Other comprehensive income (loss), net of tax:
Change in value of available-for-sale securities	(9)	5
Actuarial gain related to pension and other postretirement benefit plans	3	7
Foreign currency translation adjustments	(64)	0
Change in other comprehensive loss from unconsolidated affiliates	(16)	(4)
Other comprehensive income (loss), net of tax	(86)	8
Comprehensive income (loss)	(1,050)	1,126
Less: Comprehensive income (loss) attributable to noncontrolling interests	(121)	297
Other Comprehensive Income, Portion Attributable to Redeemable Noncontrolling Interest	12	13
Comprehensive income (loss) attributable to partners	$ (941)	$ 816