Fair Value of Financial Assets and Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Foreign currency forward sale contracts
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value measurements on a recurring basis, Assets	$ 7	[1]	$ 3	[1]
Fair value measurements on a recurring basis, Liabilities			(6)	[1]
Interest rate swap derivatives
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value measurements on a recurring basis, Assets			1	[1]
Fair value measurements on a recurring basis, Liabilities	(2)	[1]	(3)	[1]
Impaired Hotel Properties Held And Used
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value measurements on a non-recurring basis, Impaired hotel properties held and used	18		9
Significant Other Observable Inputs (Level 2) | Foreign currency forward sale contracts
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value measurements on a recurring basis, Assets	7	[1]	3	[1]
Fair value measurements on a recurring basis, Liabilities			(6)	[1]
Significant Other Observable Inputs (Level 2) | Interest rate swap derivatives
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value measurements on a recurring basis, Assets			1	[1]
Fair value measurements on a recurring basis, Liabilities	(2)	[1]	(3)	[1]
Significant Unobservable Inputs (Level 3) | Impaired Hotel Properties Held And Used
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value measurements on a non-recurring basis, Impaired hotel properties held and used	$ 18		$ 9

[1] These derivative contracts have been designated as hedging instruments.