Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended		1 Months Ended					9 Months Ended	12 Months Ended		9 Months Ended
	Sep. 30, 2013 Litigation Related to Other Taxes	Dec. 31, 2012 Litigation Related to Other Taxes	Sep. 30, 2013 Litigation Related to Other Taxes Penalties and Interest Thereon	Sep. 30, 2013 Travelocity	Sep. 30, 2013 City of San Francisco	Jan. 11, 2013 2000 - 2011 Tax Assessment Litigation Related to Other Taxes	Jan. 11, 2013 2000 - 2011 Tax Assessment Litigation Related to Other Taxes Excise Tax Related Liabilities	Jan. 11, 2013 2000 - 2011 Tax Assessment Litigation Related to Other Taxes Accrued Interest	Mar. 15, 2013 2000 - 2011 Tax Assessment Litigation Related to Other Taxes Penalties and Interest Thereon	May 20, 2013 2012 Tax Assessment Litigation Related to Other Taxes	Sep. 30, 2013 Litigation relating to occupancy tax LegalMatter	Dec. 31, 2009 Litigation relating to occupancy tax	Dec. 31, 2012 Litigation relating to occupancy tax	Sep. 30, 2013 Matters relating to hotel booking practices	Sep. 30, 2013 Matters relating to hotel booking practices Minimum
Loss Contingencies [Line Items]
Put right held by Sabre, exercisable period				24 months
Put right exercise window				2016
Number of lawsuits filed by cities, counties and states involving hotel occupancy taxes											86
Number of lawsuits currently active											35
Number of lawsuits dismissed to date											35
Number of dismissals based on finding that defendant was not subject to local hotel occupancy tax or the local government lacked standing to pursue claims											21
Reserve for legal contingencies											$ 43		$ 35
Accrual related to court decisions and final settlements related to hotel occupancy taxes											1
Occupancy tax assessments tax payment (refund)												48
Tax assessments including interest and penalties					22.0	110.0	78.0	32.0	60.0	20.5
Tax penalties on assessment, percentage									50.00%
Litigation relating to general excise tax, expense	64	110
Pay-to-play general excise tax payment	171		18
Estimate of possible amounts in excess of accrual	$ 22
Number of Putative class action law suits															30
Date of Hearing on defendants' motion to dismiss														Dec. 17, 2013