Capital Expenditures (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Capital expenditures	$ 305	$ 411	$ 296
Total segment
Segment Reporting Information [Line Items]
Capital expenditures	213	343	246
Total segment | North American Full-Service Segment
Segment Reporting Information [Line Items]
Capital expenditures	120	251	145
Total segment | North American Limited-Service Segment
Segment Reporting Information [Line Items]
Capital expenditures	7	5	8
Total segment | International
Segment Reporting Information [Line Items]
Capital expenditures	86	87	93
Other unallocated corporate
Segment Reporting Information [Line Items]
Capital expenditures	$ 92	$ 68	$ 50