Hotel Management Operating and License Agreements - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) Hotel	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Hotel Management Operating and License Agreements [Line Items]
Description of renewal periods	allow for one or more renewal periods at the option of our hotel managers.
Number of hotels operate without management agreement | Hotel	4
Franchise agreements initial term	20 years
Marketing fees	$ 55	$ 56	$ 56
Employee cost reimbursements	$ 131	$ 130	$ 126
Minimum [Member]
Hotel Management Operating and License Agreements [Line Items]
Management agreements entered into spin-off terms	20 years
Management agreements total term	30 years
Maximum [Member]
Hotel Management Operating and License Agreements [Line Items]
Management agreements entered into spin-off terms	30 years
Management agreements total term	70 years