Summary of Property and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment [Line Items]
Land and land improvements	$ 1,973	$ 1,996
Buildings and leasehold improvements	13,435	13,665
Furniture and equipment	2,223	2,227
Construction in progress	176	199
Property, Plant and Equipment, Gross, Total	17,807	18,087
Less accumulated depreciation and amortization	(6,812)	(6,499)
Property and equipment, net	$ 10,995	$ 11,588	$ 11,383