Discontinued Operations - Summary of Hotel Franchise and Hotel Management Business Presented as Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OTHER EXPENSES:
Income tax benefit	$ (1)
Loss from Discontinued Operations, net of tax		$ (5)
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		33
OPERATING EXPENSES
Corporate, general, administrative and marketing		28
Depreciation and amortization		2
Total Operating Expenses		30
Operating Income		3
OTHER EXPENSES:
Interest expense		(9)
Total Other Expenses		(9)
Loss Before Income Taxes		(6)
Income tax benefit		1
Loss from Discontinued Operations, net of tax		$ (5)