Acquisitions and Other Investments - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 17, 2015	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 8,027,179	$ 7,992,941
Orbitz Worldwide, Inc.
Payments to Acquire Businesses and Interest in Affiliates [Abstract]
Cash consideration for shares	$ 1,362,362
Repayment of Orbitz debt	432,231
Replacement restricted stock units attributable to pre-acquisition service	16,717
Other consideration	2,214
Total purchase consideration	1,813,524
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash	194,515
Accounts receivable, net	150,187
Other current assets	33,727
Long-term assets	114,800
Intangible assets with definite lives	515,003
Intangible assets with indefinite lives	166,800
Goodwill	1,454,335
Current liabilities	(636,169)
Other long-term liabilities	(54,599)
Deferred tax liabilities, net	(125,075)
Total	1,813,524
Gross accounts receivable acquired	157,000
Acquired accounts receivable estimate to be uncollectible	$ 7,000
Weighted average life of acquired intangible assets	6 years 11 days
Other Acquisitions During Nine Months Ended September 30, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets with definite lives		$ 146,126
Intangible assets with indefinite lives		163,400
Goodwill		196,431
Net assets and non-controlling interests acquired		(23,366)
Deferred tax liabilities, net		(7,910)
Total		$ 474,681
Weighted average life of acquired intangible assets		5 years 9 months 18 days
Cash acquired		$ 41,000
Non-cash consideration		$ 99,000
Minimum | Orbitz Worldwide, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Weighted average life of acquired intangible assets	1 year
Minimum | Other Acquisitions During Nine Months Ended September 30, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Estimated useful lives of acquired intangible assets		4 years
Maximum | Orbitz Worldwide, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Weighted average life of acquired intangible assets	10 years
Maximum | Other Acquisitions During Nine Months Ended September 30, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Estimated useful lives of acquired intangible assets		10 years