Business Segments - Goodwill (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Goodwill, gross	$ 948	$ 928
Accumulated impairment losses	(54)	(54)
Goodwill	894	874
Reclassifications
Segment Reporting Information [Line Items]
Goodwill	0
North American Full-Service Segment | Total segment
Segment Reporting Information [Line Items]
Goodwill, gross	392	335
Accumulated impairment losses	0	0
Goodwill	392	335
North American Full-Service Segment | Reclassifications
Segment Reporting Information [Line Items]
Goodwill	57
North American Limited-Service Segment | Total segment
Segment Reporting Information [Line Items]
Goodwill, gross	125	125
Accumulated impairment losses	(54)	(54)
Goodwill	71	71
North American Limited-Service Segment | Reclassifications
Segment Reporting Information [Line Items]
Goodwill	0
International Segment | Total segment
Segment Reporting Information [Line Items]
Goodwill, gross	431	298
Accumulated impairment losses	0	0
Additions	20
Goodwill	431	298
International Segment | Reclassifications
Segment Reporting Information [Line Items]
Goodwill	113
Former Luxury Segment | Total segment
Segment Reporting Information [Line Items]
Goodwill, gross	0	170
Accumulated impairment losses	0	0
Goodwill	0	170
Former Luxury Segment | Reclassifications
Segment Reporting Information [Line Items]
Goodwill	$ (170)