Contingencies - Commitments and Letters of Credit (Detail) In Millions, unless otherwise specified				6 Months Ended												6 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2014 Real Estate Investment Upper Limit USD ($)	Jun. 30, 2014 Renovation of Leased Hotel USD ($)	Jun. 30, 2014 Investment in Other Joint Venture Commitment USD ($) Entity	Jun. 30, 2014 Investment in Other Joint Venture Commitment EUR (€) Entity	Dec. 30, 2011 Investment in Other Joint Venture Commitment USD ($)	Dec. 30, 2011 Investment in Other Joint Venture Commitment EUR (€)	Jun. 30, 2014 Information Technology Hardware, Software, Accounting, Finance, and Maintenance Services USD ($)	Jun. 30, 2014 Commitments USD ($)	Jun. 30, 2014 Lodging Property USD ($)	Jun. 30, 2014 Outside Effective Credit Facility USD ($)	Jun. 30, 2014 Full Service and Limited Service Equity Investment for Non Controlling Interest in Partnership Commitment USD ($)	Jun. 30, 2014 Full Service and Limited Service Equity Investment for Non Controlling Interest in Partnership Commitment Upper Limit USD ($)	Jun. 30, 2014 Limited Service Equity Investment for Non Controlling Interest in Partnership Commitment USD ($)	Jun. 30, 2014 Limited Service Equity Investment for Non Controlling Interest in Partnership Commitment Upper Limit USD ($)	Jun. 30, 2014 Debt Securities Mandatorily Redeemable Preferred Equity Ownership Interest USD ($) hotel
Commitments and Contingencies Disclosure [Line Items]
Investment commitments													$ 9		$ 22	$ 10
Investment commitments expected to be funded in 2014			13									1
Investment commitments expected to be funded in 2015		11										4		3
Investment commitments expected to be funded in 2016														6
Investment commitments not expected to be funded									35			4		13
Number of new joint ventures				2	2
Contingent acquisition period				7 years	7 years
Deposits in conjunction with contingent obligation to acquire the interest in joint ventures						20	15
Deposits in conjunction with contingent obligation to acquire the interest in joint ventures, remaining amount				15	11
Purchase commitments								86
Purchase commitments expected to be funded in 2014								68
Purchase commitments expected to be funded in 2015								16
Purchase commitments expected to be funded in 2016								2
Number of hotels included in investment commitments																3
Loan commitment, amount										9
Letters of credit outstanding											77
Surety bonds issued	$ 124