CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	[1]	Dec. 31, 2017	[1]
Statement of Comprehensive Income [Abstract]
Net income	$ 891		$ 537		$ 1,046
Change in value of pension and other postretirement liabilities:
Amortization of prior service cost and net loss, including loss on settlements and curtailments included in net periodic pension cost	8	[2]	10		2
Net actuarial loss incurred in period	(5)	[3]	(2)		(13)
Total change in value of pension and postretirement liabilities	3		8		(11)
Change in currency translation adjustment	0		0		6
Comprehensive income	$ 894		$ 545		$ 1,041

[1] In 2018 and 2017, deferred tax activity incurred in other comprehensive income was offset by a valuation allowance.

[2] Net of $2 million in taxes for the year ended December 31, 2019.

[3] Net of ($1) million in taxes for the year ended December 31, 2019.