Discontinued Operations - Summary of Hotel Franchise and Hotel Management Business Presented as Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
OTHER EXPENSES:
Loss on extinguishment of debt	$ (10)	$ (10)
Income tax benefit		(7)
Loss from Discontinued Operations, net of tax	(20)	(25)
Discontinued Operations [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
FRANCHISE, MANAGEMENT AND OTHER FEE BASED REVENUES	25	58
OPERATING EXPENSES
Corporate, general, administrative and marketing	36	64
Depreciation and amortization	2	4
Total Operating Expenses	38	68
Operating Loss	(13)	(10)
OTHER EXPENSES:
Interest expense	(6)	(15)
Loss on extinguishment of debt	(7)	(7)
Total Other Expenses	(13)	(22)
Loss Before Income Taxes	(26)	(32)
Income tax benefit	6	7
Loss from Discontinued Operations, net of tax	$ (20)	$ (25)