Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ (46)	$ 174
Postretirement and postemployment plans:
Change in actuarial (loss) for postretirement and postemployment plans	0	(4)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(22)	0
Foreign currency translation:
Other comprehensive loss	(22)	(4)
Comprehensive income (loss)	$ (68)	$ 170

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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