Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill		$ 5,159	$ 5,160	$ 5,190
Foreign currency translation		(1)	(30)
Ownership
Goodwill [Line Items]
Gross carrying value	[1]	438	439	444
Accumulated impairment losses	[1]	340	340	340
Goodwill	[1]	98	99	104
Foreign currency translation	[1]	(1)	(5)
Management and franchise
Goodwill [Line Items]
Accumulated impairment losses	[2]	0	0	0
Goodwill	[2]	5,061	5,061	$ 5,086
Foreign currency translation	[2]	$ 0	$ (25)

[1] Amounts for the ownership reporting unit include gross carrying values of $438 million, $439 million and $444 million as of December 31, 2019, 2018 and 2017, respectively, and accumulated impairment losses of $340 million as of December 31, 2019, 2018 and 2017.

[2] There were no accumulated impairment losses for the management and franchise reporting unit as of December 31, 2019, 2018 and 2017.