Acquisitions and Dispositions - Acquisitions (Detail) In Millions, unless otherwise specified			3 Months Ended
	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 30, 2014 Protea Hospitality Holdings USD ($) room country brand hotel	Jun. 30, 2014 Protea Hospitality Holdings ZAR
Business Acquisition [Line Items]
Cash paid for acquisition			$ 193	2,046
Intangible assets including goodwill			184	1,943
Deferred contract acquisition costs			91	960
Brand intangible			73	772
Goodwill	894	874	20	211
Tangible assets			$ 9	103
Number of hotels acquired			113	113
Number of hotel rooms acquired			10,016	10,016
Number of hotel brands			3	3
Number of countries in which entity operates			7	7
Percent of hotel rooms managed			45.00%	45.00%
Percent of hotel rooms franchised			39.00%	39.00%
Percent of hotel rooms leased			16.00%	16.00%