Goodwill and Intangible Assets, Net - Summary of Changes in Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Goodwill [Line Items]
Beginning balance	$ 502		$ 472
Additions	253	[1],[2]	30	[1],[3]
Foreign exchange translation adjustment	(21)	[4]
Ending balance	734		502
Trip Advisor Segment
Goodwill [Line Items]
Beginning balance	502		472
Additions	253	[1]	30	[1]
Foreign exchange translation adjustment	(21)	[4]
Allocation to new segments	(734)	[5]
Ending balance			502
Hotels Segment
Goodwill [Line Items]
Allocation to new segments	442	[5]
Ending balance	442
Other Segment
Goodwill [Line Items]
Allocation to new segments	292	[5]
Ending balance	$ 292

[1] The additions to goodwill relate to our business acquisitions. See “Note 3— Acquisitions,” for further information.

[2] Goodwill in the amount of $5 million is expected to be deductible for tax purposes.

[3] Goodwill in the amount of $14 million is expected to be deductible for tax purposes.

[4] Primarily related to impact of changes in foreign exchange rates to goodwill.

[5] See “Note 16—Segments and Geographic Information” for information on our reporting segment changes in the fourth quarter of 2014.