Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Changes in Accumulated Other Comprehensive Loss [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (40)	$ (38)
Accumulated other comprehensive income (loss), defined benefit plans, net of tax	(49)	(47)
Accumulated other comprehensive loss	(89)	(85)
Other comprehensive income (loss), foreign currency translation adjustments, before reclassification adjustment, after of tax	(2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2)
Other Comprehensive Income (Loss), Gain (loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Net of Tax	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	3
Other comprehensive income, gain (loss), reclassification adjustment from AOCI, after tax	3
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	(2)	(86)	$ 124
Post-employment benefits	3	18	49
Other comprehensive income (loss), net of tax	1	$ (68)	$ 173
Elimination of stranded tax effects resulting from tax legislation, translation adjustments	0
Elimination of stranded tax effects resulting from tax legislation, Defined benefit plan	(5)
Elimination of stranded tax effects resulting from tax legislation	$ (5)