Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
AOCI, Translation adjustments, net of tax			$ (38)
AOCI, Post-retirement benefits and other, net of tax			(50)
Accumulated other comprehensive loss, net of tax			$ (88)
Other comprehensive income (loss), translation adjustments, before reclassification adjustment, net of tax	$ (4)
Other comprehensive income (loss), post-retirement benefits, before reclassification adjustment, net of tax	0
Other comprehensive income (loss), before reclassification adjustment, net of tax	(4)
Other comprehensive income, translation adjustments, gain (loss), reclassification from AOCI, net of tax	1
Other comprehensive income (loss), post-retirement benefits, gain (loss), reclassification adjustment from AOCI, after Tax	0
Other comprehensive income, gain (loss) reclassification adjustment from AOCI, net of tax	1
Other comprehensive loss, translation adjustments, net of tax	(3)	$ (1)
Other comprehensive income (loss), post-retirement benefits, net of tax	0	$ 1
Other comprehensive loss, net of tax	$ (3)