Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,186	$ 1,197	$ 1,196
Foreign currency translation	(1)	(11)	1
Balance at end of period	1,185	1,186	1,197
North America [Member]
Goodwill [Roll Forward]
Balance at beginning of period	1,105	1,105	1,105
Foreign currency translation	0	0	0
Balance at end of period	1,105	1,105	1,105
International [Member]
Goodwill [Roll Forward]
Balance at beginning of period	81	92	91
Foreign currency translation	(1)	(11)	1
Balance at end of period	$ 80	$ 81	$ 92