Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	$ (300)	$ (200)	$ (334)
Change during period	7	(101)	126
Reclassified into operations	(1)	(1)	(8)
Balance at the end of the period	(292)	(300)	(200)
Foreign Currency Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(282)	(183)	(310)
Change during period	26	(99)	127
Reclassified into operations	0	0	0
Balance at the end of the period	(256)	(282)	(183)
Derivative Financial Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	0	0	(4)
Change during period	(11)	0	(3)
Reclassified into operations	0	0	(7)
Balance at the end of the period	(11)	0	0
Other comprehensive income (loss), tax benefit (expense)	4	0	(3)
Unrecognized pension benefit costs, net of taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the period	(18)	(17)	(20)
Change during period	(8)	(2)	2
Reclassified into operations	(1)	(1)	(1)
Balance at the end of the period	(25)	(18)	(17)
Other comprehensive income (loss), tax benefit (expense)	$ 1	$ 1	$ (1)