Quarterly Financial Information - Summary of Selected Unaudited Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Year ended December 31, 2014
Revenue	$ 288	$ 354	$ 323	$ 281	$ 213	$ 255	$ 247	$ 230	$ 1,246	$ 945	$ 763
Operating income	60	84	100	96	28	84	94	88	340	294	296
Net income	36	54	68	68	20	56	67	62	226	205	195
Net income attributable to TripAdvisor, Inc.	$ 36	$ 54	$ 68	$ 68	$ 20	$ 56	$ 67	$ 62	$ 226	$ 205	$ 194
Basic earnings per share	$ 0.25	$ 0.38	$ 0.48	$ 0.48	$ 0.14	$ 0.39	$ 0.47	$ 0.44	$ 1.58	$ 1.44	$ 1.39
Diluted earnings per share	$ 0.25	$ 0.37	$ 0.47	$ 0.47	$ 0.14	$ 0.38	$ 0.46	$ 0.43	$ 1.55	$ 1.41	$ 1.37