Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income		$ (247)	$ 41	$ (1,992)	$ (3)
Net income attributable to noncontrolling interests		(24)	(29)	(75)	(52)
Other comprehensive income:
Reclassification of realized losses on pension and postretirement benefits to income	[1]	0	1	0	1
Comprehensive (loss) income attributable to common stock		$ (271)	$ 13	$ (2,067)	$ (54)

[1] No associated tax for the three and six months ended June 30, 2020 and 2019. See Note 10 Pension and Postretirement Benefit Plans for additional information.