Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ (684)	$ 302	$ 165
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	33	12	(81)
Currency translation adjustment	(2)
Cash flow hedges:
Net unrealized holding gains (losses), net of tax of $14, $7, and $0, respectively	(39)	(20)	(2)
Reclassification of cash flow hedges to earnings, net of tax of $(3), $1, and $1, respectively	8	(3)	(2)
Minimum pension liability adjustment:
Pension and post-retirement benefits, net of tax of $12, $6, and $6, respectively	(36)	(20)	(23)
Reclassification of pension and post-retirement benefits to earnings, net of tax of $(3), $(2), and $(2), respectively	6	6	5
Other comprehensive income (loss)	(30)	(25)	(103)
Total comprehensive income (loss)	(714)	277	62
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(714)	277	62
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	$ 33	$ 12	$ (81)