Acquisitions and Dispositions - Additional Information (Details) $ in Millions		1 Months Ended	12 Months Ended
		Aug. 31, 2014 USD ($) shares	Dec. 31, 2016 USD ($) Business		Dec. 31, 2015 USD ($) Business		Dec. 31, 2014 USD ($) Business	Aug. 31, 2015 USD ($)
Acquisitions And Dispositions [Line Items]
Cash acquired from acquisition							$ 62
Cost method investments			$ 14		$ 0
Disposal group, gain on sale of subsidiary	[1]				20
One of Chinese Subsidiaries
Acquisitions And Dispositions [Line Items]
Disposal group, percentage of ownership interest sold								100.00%
Disposal group, total consideration								$ 28
Disposal group, deconsolidated assets on sale of business								11
Disposal group, cash included in deconsolidated asset								3
Disposal group, deconsolidated liabilities on sale of business								$ 4
Disposal group, gain on sale of subsidiary					20
Series of Individually Immaterial Business Acquisitions
Acquisitions And Dispositions [Line Items]
Acquisition-related costs			$ 1		$ 1		$ 4
Number of business acquired | Business			5		3		6
Total acquisition purchase price		$ 192	$ 34				$ 208
Cash consideration paid, net of cash acquired		132	28		$ 28		199
Cash acquired from acquisition			4				7
Cash held back on acquisition			2				2
Purchase price consideration			$ 34	[2]	$ 28	[3]	$ 400
Cash consideration paid		$ 187
Stock option issued related to acquisition | shares		100,595
Fair value of stock option issued related to acquisition		$ 5
Unrecognized compensation expense, Stock Options		$ 3
Period of recognition (in years)		3 years
Percentage of consolidated revenue accounted by acquisitions							3.00%
Series of Individually Immaterial Business Acquisitions | Viator, Inc [Member]
Acquisitions And Dispositions [Line Items]
Cash acquired from acquisition		$ 55
Tous Au Restaurant
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock			100.00%
Date of acquisition			Jan. 31, 2016
HouseTrip
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock			100.00%
Date of acquisition			Apr. 30, 2016
Citymaps
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock			100.00%
Date of acquisition			Aug. 31, 2016
Sneat
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock			100.00%
Date of acquisition			Oct. 31, 2016
Couverts
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock			100.00%
Date of acquisition			Oct. 31, 2016
ZeTrip
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock					100.00%
Date of acquisition					Jan. 31, 2015
BestTables
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock					100.00%
Date of acquisition					Mar. 31, 2015
Dimmi
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock					100.00%
Date of acquisition					May 31, 2015
Vacation Home Rentals
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock							100.00%
Date of acquisition							May 31, 2014
Tripbod
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock							100.00%
Date of acquisition							May 31, 2014
Lafourchette
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock							100.00%
Date of acquisition							May 31, 2014
MyTable and Restopolis
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock							100.00%
Date of acquisition							Oct. 31, 2014
Iens
Acquisitions And Dispositions [Line Items]
Business acquisition percentage of outstanding shares of capital stock							100.00%
Date of acquisition							Dec. 31, 2014

[1] See “Note 3 – Acquisitions and Dispositions” for information regarding our gain on sale of business in 2015.

[2] Subject to adjustment based on (i) final working capital adjustment calculations to be determined for Sneat and Couverts, and (ii) indemnification obligations for general representations and warranties of the acquired company stockholders.

[3] Subject to adjustment based on indemnification obligations for general representations and warranties of certain acquired company stockholders.