Interest Rate Swap Derivatives Designated as Cash Flow Hedges (Detail) $ in Millions		12 Months Ended
		Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 AUD	Dec. 31, 2015 NZD
Derivative [Line Items]
Change in Fair Value Gain (Loss)		$ 11	$ 19	$ (3)
Interest rate swap derivatives
Derivative [Line Items]
Notional Amount | NZD						NZD 53,000,000
Interest rate swap derivatives | New Zealand
Derivative [Line Items]
Notional Amount		$ 36
Cash Flow Hedging | Interest rate swap derivatives | Swap Entered In Connection With Mortgage Loan On Hilton Melbourne South Wharf | Australia
Derivative [Line Items]
Transaction Date	[1]	November 2011
Notional Amount | AUD	[1]				AUD 62,000,000
Maturity Date	[1]	2016-11
Swapped Index	[1]	Reuters BBSY
All-in-Rate	[1]	6.70%			6.70%	6.70%
Change in Fair Value Gain (Loss)	[1]	$ 1
Cash Flow Hedging | Interest rate swap derivatives | Swap Entered In Connection With Four Properties | New Zealand
Derivative [Line Items]
Transaction Date	[2]	February 2011
Notional Amount | NZD	[2]					NZD 53,000,000
Maturity Date	[2]	2016-02
Swapped Index	[2]	NZ$ Bank Bill
All-in-Rate	[2]	7.15%			7.15%	7.15%

[1] The swap was entered into in connection with the A$86 million ($63 million) mortgage loan on the Hilton Melbourne South Wharf.

[2] The swap was entered into in connection with the NZ$53 million ($36 million) mortgage loan on four properties in New Zealand.