Business Segments - Net Income (Loss) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest expense and interest income	$ (26)	$ (24)	$ (51)	$ (52)
Provision for income taxes	(93)	(84)	(152)	(149)
Net income	192	179	364	315
Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment financial results	379	325	690	614
Other unallocated corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment financial results	(68)	(38)	(123)	(98)
North American Full-Service Segment | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment financial results	154	135	285	268
North American Limited-Service Segment | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment financial results	151	135	266	241
International Segment | Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment financial results	$ 74	$ 55	$ 139	$ 105