Tripadvisor (TRIP) 10-Q 28 Jul 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 23, 2014	Jul. 23, 2014
		Common Stock	Class B Common Stock
Document Information [Line Items]	'	'	'
Document Type	'10-Q	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Jun-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'Q2	'	'
Entity Registrant Name	'TripAdvisor, Inc.	'	'
Entity Central Index Key	'0001526520	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	129,985,348	12,799,999

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended				6 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenue	$323		$247		$604		$477
Costs and expenses:	'		'		'		'
Cost of revenue	9	[1]	4	[1]	17	[1]	8	[1]
Selling and marketing	127	[2]	83	[2]	228	[2]	162	[2]
Technology and content	41	[2]	32	[2]	79	[2]	61	[2]
General and administrative	32	[2]	25	[2]	58	[2]	48	[2]
Depreciation	11		7		21		13
Amortization of intangible assets	3		2		5		3
Total costs and expenses:	223		153		408		295
Operating income	100		94		196		182
Other income (expense):	'		'		'		'
Interest expense	-2		-2		-4		-5
Interest income and other, net	'		-2		'		-3
Total other expense, net	-2		-4		-4		-8
Income before income taxes	98		90		192		174
Provision for income taxes	-30		-23		-56		-45
Net income	68		67		136		129
Earnings per share attributable to common stockholders (Note 14):	'		'		'		'
Basic	$0.48		$0.47		$0.95		$0.90
Diluted	$0.47		$0.46		$0.93		$0.89
Weighted average common shares outstanding (Note 14):	'		'		'		'
Basic	142,701		143,531		142,550		143,297
Diluted	145,782		145,664		145,724		145,160
Stock-based compensation:	'		'		'		'
Stock-based compensation	15		10		29		24
Website development costs	'		'		'		'
Costs and expenses:	'		'		'		'
Depreciation	7		5		13		9
Selling and Marketing	'		'		'		'
Stock-based compensation:	'		'		'		'
Stock-based compensation	3		2		6		5
Technology and Content	'		'		'		'
Stock-based compensation:	'		'		'		'
Stock-based compensation	6		4		12		10
General and Administrative	'		'		'		'
Stock-based compensation:	'		'		'		'
Stock-based compensation	$6		$4		$11		$9
[1]	Excludes amortization as follows:
[2]	Includes stock-based compensation as follows:

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$68	$67	$136	$129
Other comprehensive income (loss), net of tax :	'	'	'	'
Foreign currency translation adjustments	-1	'	'	-3
Available-for-sale investments:	'	'	'	'
Change in net unrealized loss	'	-1	'	-1
Total other comprehensive loss, net of tax	-1	-1	'	-4
Comprehensive income	$67	$66	$136	$125

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$587	$351
Short-term marketable securities (Note 5)	51	131
Accounts receivable, net of allowance for doubtful accounts of $4 and $3 at June 30, 2014 and December 31, 2013, respectively	185	113
Prepaid expenses and other current assets	32	35
Total current assets	855	630
Long-term assets:	'	'
Long-term marketable securities (Note 5)	83	188
Property and equipment, net (Note 6)	141	82
Other long-term assets	32	19
Intangible assets, net (Note 7)	113	52
Goodwill (Note 7)	607	502
TOTAL ASSETS	1,831	1,473
Current liabilities:	'	'
Accounts payable	27	10
Deferred merchant payables	109	30
Deferred revenue	61	44
Credit facility borrowings (Note 8)	33	28
Borrowings, current (Note 8)	40	40
Taxes payable	11	5
Accrued expenses and other current liabilities	105	86
Total current liabilities	386	243
Deferred income taxes, net	28	13
Other long-term liabilities (Note 10)	111	52
Borrowings, net of current portion (Note 8)	280	300
Total Liabilities	805	608
Commitments and contingencies (Note 11)	'	'
Stockholdersb equity: (Note 12)	'	'
Preferred stock, $0.001 par value Authorized shares: 100,000,000 Shares issued and outstanding: 0 and 0	'	'
Common stock	'	'
Additional paid-in capital	633	608
Retained earnings	538	402
Treasury stock-common stock, at cost, 2,120,709 and 2,120,709 shares	-145	-145
Total Stockholdersb Equity	1,026	865
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,831	1,473
Class B Common Stock	'	'
Stockholdersb equity: (Note 12)	'	'
Common stock	'	'

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Allowance for doubtful accounts	$4	$3
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	1,600,000,000	1,600,000,000
Common stock, shares issued	132,091,353	131,537,798
Common stock, shares outstanding	129,970,644	129,417,089
Treasury stock, shares	2,120,709	2,120,709
Class B Common Stock	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	12,799,999	12,799,999
Common stock, shares outstanding	12,799,999	12,799,999

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (USD $)	Total	Class B Common Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock
In Millions, except Share data	USD ($)			USD ($)	USD ($)	USD ($)
Beginning balance at Dec. 31, 2013	$865	'	'	$608	$402	($145)
Beginning balance, shares at Dec. 31, 2013	131,537,798	12,799,999	131,537,798	'	'	2,120,709
Net income	136	'	'	'	136	'
Issuance of common stock related to exercises of options and vesting of RSUs	2	'	'	2	'	'
Issuance of common stock related to exercise of options and vesting of RSUs, shares	'	'	553,555	'	'	'
Tax benefits on equity awards	14	'	'	14	'	'
Minimum withholding taxes on net share settlements of equity awards	-23	'	'	-23	'	'
Stock based compensation	32	'	'	32	'	'
Ending balance at Jun. 30, 2014	$1,026	'	'	$633	$538	($145)
Ending balance, shares at Jun. 30, 2014	132,091,353	12,799,999	132,091,353	'	'	2,120,709

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities:	'	'
Net income	$136	$129
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation of property and equipment, including amortization of internal-use software and website development	21	13
Stock-based compensation	29	24
Amortization of intangible assets	5	3
Amortization of discounts and premiums on marketable securities, net	2	3
Deferred tax benefit	-3	-4
Excess tax benefits from stock-based compensation	-14	-5
Other, net	1	3
Changes in operating assets and liabilities, net of effects from acquisitions:	'	'
Accounts receivable, prepaid expenses and other assets	-65	-74
Accounts payable, accrued expenses and other liabilities	35	-1
Deferred merchant payables	79	16
Income taxes, net	25	18
Deferred revenue	16	8
Net cash provided by operating activities	267	133
Investing activities:	'	'
Acquisitions, net of cash acquired	-152	-31
Capital expenditures, including internal-use software and website development	-42	-24
Purchases of marketable securities	-219	-346
Sales of marketable securities	324	68
Maturities of marketable securities	79	77
Net cash used in investing activities	-10	-256
Financing activities:	'	'
Repurchase of common stock	'	-34
Proceeds from credit facilities	8	7
Payments to credit facilities	-3	-15
Principal payments on long-term debt	-20	-20
Proceeds from exercise of stock options	2	20
Payment of minimum withholding taxes on net share settlements of equity awards	-23	-6
Excess tax benefits from stock-based compensation	14	5
Payments on construction in-process related to build to suit lease obligation	-2	'
Net cash used in financing activities	-24	-43
Effect of exchange rate changes on cash and cash equivalents	3	-2
Net increase (decrease) in cash and cash equivalents	236	-168
Cash and cash equivalents at beginning of period	351	368
Cash and cash equivalents at end of period	587	200
Supplemental disclosure of non-cash investing and financing activities:	'	'
Capitalization of construction in-process related to build to suit lease obligation	$28	'

Organization_Business_Descript

Organization, Business Description and Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Organization, Business Description and Basis of Presentation	'
	NOTE 1: ORGANIZATION, BUSINESS DESCRIPTION AND BASIS OF PRESENTATION
	We refer to TripAdvisor, Inc. and our wholly-owned subsidiaries as “TripAdvisor,” “the Company,” “us,” “we” and “our” in these notes to the Unaudited Consolidated Financial Statements.
	Description of Business
	TripAdvisor is an online travel company, empowering users to plan and have the perfect trip. TripAdvisor’s travel research platform aggregates reviews and opinions of members about destinations, accommodations, restaurants and activities throughout the world through our flagship TripAdvisor brand. TripAdvisor-branded websites include tripadvisor.com in the United States and localized versions of the website in 41 countries, including in China under the brand daodao.com. Beyond travel-related content, TripAdvisor websites also include links to the websites of our travel advertisers allowing travelers to directly book their travel arrangements. In addition to the flagship TripAdvisor brand, we manage and operate 23 other travel brands, connected by the common goal of providing comprehensive travel planning resources across the travel sector. We derive substantially all of our revenue from advertising, primarily through click-based advertising and display-based advertising sales. In addition, we earn revenue through a combination of subscription-based offerings from our Business Listings, subscription and free-to-list commission-based offerings from our Vacation Rental products, transaction revenue from making hotel room nights available for booking and online reservations made from restaurant customers on our transactional sites, and other revenue from, among other things, licensing our content to third-parties. We have one operating and reportable segment: TripAdvisor. The segment is determined based on how our chief operating decision maker manages our business, makes operating decisions and evaluates operating performance.
	Basis of Presentation
	We have prepared the accompanying unaudited consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”). We have included all adjustments necessary for a fair presentation of the results of the interim period. These adjustments consist of normal recurring items. We prepared the unaudited consolidated financial statements following the requirements of the U.S. Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, we have condensed or omitted certain footnotes or other financial information that are normally required by GAAP for annual financial statements. Our interim unaudited consolidated financial statements are not necessarily indicative of results that may be expected for any other interim period or for the full year. These interim unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2013, previously filed with the SEC.
	Principles of Consolidation
	These accompanying unaudited financial statements present our results of operations, financial position and cash flows on a consolidated basis. The accompanying unaudited consolidated financial statements include TripAdvisor, our wholly-owned subsidiaries, and entities we control, or in which we have a variable interest and are the primary beneficiary of expected cash profits or losses. We have eliminated significant intercompany transactions and accounts.
	Certain of our subsidiaries that operate in China have variable interests in affiliated entities in China in order to comply with Chinese laws and regulations, which restrict foreign investment in Internet content provision businesses. Although we do not own the capital stock of some of our Chinese affiliates, we consolidate their results as we are the primary beneficiary of the cash losses or profits of these variable interest affiliates and have the power to direct the activities of these affiliates. Our variable interest entities are not material for all periods presented.
	Reclassifications
	Pursuant to our disclosure in “Note 15— Related Party Transactions” in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013, we no longer consider Expedia, Inc. ("Expedia”) a related party.    Certain reclassifications have been made to conform the prior period to the current presentation relating to Expedia transactions, which includes the reclassification of revenue from Expedia on our unaudited statements of operations to revenue and the reclassification of receivables from Expedia, net on our unaudited consolidated balance sheets to accounts receivable.   These reclassifications had no net effect on our unaudited consolidated financial statements.
	All other reclassifications, made to conform the prior period to the current presentation, were not material and had no net effect on our unaudited consolidated financial statements.
	Accounting Estimates
	We use estimates and assumptions in the preparation of our unaudited consolidated financial statements in accordance with GAAP. Our estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of our unaudited consolidated financial statements. These estimates and assumptions also affect the reported amount of net income or loss during any period. Our actual financial results could differ significantly from these estimates. The significant estimates underlying our unaudited consolidated financial statements include recoverability of long-lived assets and investments, including intangible assets and goodwill; income taxes; purchase accounting for business combinations and stock-based compensation.
	Seasonality
	Expenditures by travel advertisers tend to be seasonal. Traditionally, our strongest quarter has been the third quarter, which is a key travel research period, with the weakest quarter being the fourth quarter. However, adverse economic conditions or continued growth of our international operations with differing holiday peaks may influence the typical trend of our seasonality in the future.

Significant_Accounting_Policie

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Significant Accounting Policies	'
	NOTE 2: SIGNIFICANT ACCOUNTING POLICIES
	New Accounting Pronouncements Not Yet Adopted
	Revenue From Contracts With Customers
	In May 2014, the FASB issued new accounting guidance on revenue from contracts with customers.  The new guidance requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated guidance will replace most existing revenue recognition guidance in GAAP when it becomes effective and permits the use of either a retrospective or cumulative effect transition method. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016.  We have not yet selected a transition method and we are currently evaluating the effect that the updated standard will have on our unaudited consolidated financial statements and related disclosures.
	Recently Adopted Accounting Pronouncements
	Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists
	In July 2013, the FASB issued new accounting guidance on the presentation of unrecognized tax benefits. The new guidance requires an entity to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows: to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use the deferred tax asset for such purpose, then the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2013, with early adoption permitted. Accordingly, we adopted these presentation requirements during the first quarter of 2014. The adoption of this new guidance did not have a material impact on our unaudited consolidated financial statements and related disclosures.
	There have been no material changes to our significant accounting policies since December 31, 2013. For additional information about our critical accounting policies and estimates, refer to “Note 2— Significant Accounting Policies”, in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2014
Acquisitions	'
	NOTE 3: ACQUISITIONS
	During the six months ended June 30, 2014, we completed three acquisitions for total cash consideration of $152 million, net of cash acquired and holdbacks for general representations and warranties. The total cash consideration is subject to adjustment based on the finalization of working capital adjustments. We acquired Vacation Home Rentals, a U.S.-based vacation rental website featuring more than 14,000 properties around the world; London-based Tripbod, a travel community that helps connect travelers to local experts to deliver travelers relevant recommendations to help plan the perfect trip; and Lafourchette, a provider of an online and mobile reservations platform for restaurants in France, Spain and Switzerland.
	The total purchase price of these acquisitions, all of which were accounted for as purchases of businesses under the acquisition method, have been allocated to tangible and identifiable intangible assets acquired and liabilities assumed, based on their respective fair values on the acquisition date. The purchase price allocation of our 2014 acquisitions are preliminary and subject to revision as more information becomes available, but in any case will not be revised beyond twelve months after the acquisition date and any change to the fair value of assets acquired or liabilities assumed acquired will lead to a corresponding change to the purchase price allocable to goodwill on a retroactive basis. The primary areas of the purchase price allocation that are not yet finalized are related to the fair values of intangibles assets, net assets, and income tax balances. Acquisition-related costs were expensed as incurred and were $1 million during the six months ended June 30, 2014. All acquisition-related expenses are included in general and administrative expenses on our unaudited consolidated statements of operations.
	The following table presents the purchase price allocations initially recorded on our consolidated balance sheet on June 30, 2014 for all 2014 acquisitions (in millions):
		Total
	Net assets (1)	$	6
	Goodwill (2)		105
	Intangible assets (3)		66
	Deferred tax liabilities, net		(17	)
	Total purchase price consideration (4)	$	160
	-1	Includes cash acquired of $6 million.
	-2	The goodwill represents the excess value over both tangible and intangible assets acquired. The goodwill in these transactions is primarily attributable to expected operational synergies, potential new and expanded business relationships and user bases, the assembled workforces, and the future development initiatives of the assembled workforces. Goodwill in the amount of $4 million is expected to be deductible for tax purposes.
	-3	Identifiable definite-lived intangible assets were comprised of developed technology of $6 million, trade names of $11 million, and subscriber and customer relationships of $49 million. The overall weighted-average life of the identifiable definite-lived intangible assets acquired in the purchase of the companies was 11.5 years, which will be amortized on a straight-line basis over their estimated useful lives.
	-4	Subject to adjustment based on final working capital adjustment calculations for Vacation Home Rentals and Lafourchette as of June 30, 2014.

Stock_Based_Awards_and_Other_E

Stock Based Awards and Other Equity Instruments	6 Months Ended
	Jun. 30, 2014
Stock Based Awards and Other Equity Instruments	'
	NOTE 4: STOCK BASED AWARDS AND OTHER EQUITY INSTRUMENTS
	Stock-Based Compensation Expense
	The following table presents the amount of stock-based compensation expense related to stock-based awards, primarily stock options and RSUs, on our unaudited consolidated statements of operations during the periods presented:
			Three months ended						Six months ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in millions)						(in millions)
	Selling and marketing		$	3		$	2		$	6		$	5
	Technology and content			6			4			12			10
	General and administrative			6			4			11			9
	Total stock-based compensation			15			10			29			24
	Income tax benefit from stock-based compensation			(6	)		(4	)		(11	)		(9	)
	Total stock-based compensation, net of tax effect		$	9		$	6		$	18		$	15
	Stock-Based Award Activity and Valuation
	2014 Stock Option Activity
	During the six months ended June 30, 2014, we have issued 490,508 of service-based non-qualified stock options under the TripAdvisor, Inc. 2011 Stock and Incentive Plan, as amended (the “2011 Plan”). These stock options have a term of ten years from the date of grant and generally vest equitably over a four-year requisite service period. We will amortize the fair value of the 2014 grants, net of estimated forfeitures, as stock-based compensation expense over the vesting term on a straight-line basis, with the amount of compensation expense recognized at any date at least equaling the portion of the grant-date fair value of the award that is vested at that date.
	A summary of the status and activity for stock option awards relating to our common stock for the six months ended June 30, 2014, is presented below:
						Weighted			Weighted
						Average			Average
						Exercise			Remaining			Aggregate
			Options			Price Per			Contractual			Intrinsic
			Outstanding			Share			Life			Value
			(in thousands)						(in years)			(in millions)
	Options outstanding at January 1, 2014			9,470		$	40.18
	Granted			491			96.45
	Exercised (1)			(834	)		33.46
	Cancelled or expired			(217	)		44.99
	Options outstanding at June 30, 2014			8,910		$	43.79			5.5		$	578
	Exercisable as of June 30, 2014			3,984		$	31.79			3.2		$	306
	Vested and expected to vest after June 30, 2014			8,282		$	43.01			5.3		$	544
	-1	Inclusive of 432,283 options which were not converted into shares due to net share settlement in order to cover the aggregate exercise price and the minimum amount of required employee withholding taxes. Potential shares that had been convertible under stock options that were withheld under net share settlement remain in the authorized but unissued pool under the 2011 Plan and can be reissued by the Company. Total payments for the employees’ tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the unaudited consolidated statements of cash flows.
	Aggregate intrinsic value represents the difference between the closing stock price of our common stock and the exercise price of outstanding, in-the-money options. Our closing stock price as reported on NASDAQ as of June 30, 2014 was $108.66. The total intrinsic value of stock options exercised for the six months ended June 30, 2014 and 2013 was $51 million and $27 million, respectively.
	The fair value of stock option grants under the 2011 Plan has been estimated at the date of grant using the Black–Scholes option pricing model with the following weighted average assumptions for the periods presented:
			Three months ended						Six months ended
			June 30,						June 30,
			2014			2013			2014			2013
	Risk free interest rate			1.98	%		1.07	%		1.97	%		1.07	%
	Expected term (in years)			6.25			6.25			6.38			6.25
	Expected volatility			47.32	%		51.82	%		48.07	%		51.73	%
	Expected dividend yield		—  %			—  %			—  %			—  %
	The weighted-average grant date fair value of options granted was $47.25 and $23.15 for the six months ended June 30, 2014 and 2013, respectively. The total fair value of stock options vested for the six months ended June 30, 2014 and 2013 was $24 million and $20 million, respectively.
	2014 RSU Activity
	During the six months ended June 30, 2014, we issued 512,884 RSUs under the 2011 Plan for which the fair value was measured based on the quoted price of our common stock on the date of grant. These RSUs generally vest over a four-year requisite service period. We will amortize the fair value of the 2014 grants, net of estimated forfeitures, as stock-based compensation expense over the vesting term on a straight-line basis, with the amount of compensation expense recognized at any date at least equaling the portion of the grant-date fair value of the award that is vested at that date.
	The following table presents a summary of RSU activity on our common stock during the six months ended June 30, 2014:
						Weighted
						Average
						Grant-			Aggregate
			RSUs			Date Fair			Intrinsic
			Outstanding			Value Per Share			Value
			(in thousands)						(in millions)
	Unvested RSUs outstanding as of January 1, 2014			1,135		$	49.64
	Granted			513			96
	Vested and released (1)			(250	)		44.86
	Cancelled			(80	)		64.27
	Unvested RSUs outstanding as of June 30, 2014			1,318		$	67.69		$	143
	-1	Inclusive of 89,494 RSUs withheld to satisfy employee minimum tax withholding requirements due to net share settlement. Potential shares which had been convertible under RSUs that were withheld under net share settlement remain in the authorized but unissued pool under the 2011 Plan and can be reissued by the Company. Total payments for the employees’ tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the unaudited consolidated statements of cash flows.
	Unrecognized Stock-Based Compensation
	A summary of our remaining unrecognized stock-based compensation expense, net of estimated forfeitures, and the weighted average remaining amortization period at June 30, 2014 related to our non-vested stock options and RSU awards is presented below (in millions):
			Stock
			Options			RSUs
	Unrecognized compensation expense (net of forfeitures)		$	91		$	55
	Weighted average period remaining (in years)			3			3.2

Financial_Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2014
Financial Instruments	'
	NOTE 5: FINANCIAL INSTRUMENTS
	Cash, Cash Equivalents and Marketable Securities
	The following tables show our cash and available-for-sale securities’ amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents or short and long-term marketable securities for the periods presented (in millions):
			30-Jun-14
												Cash and		Short-Term		Long-Term
			Amortized			Unrealized		Unrealized		Fair		Cash		Marketable		Marketable
			Cost			Gains		Losses		Value		Equivalents		Securities		Securities
	Cash		$	399		$	-	$	-	$	399	$	399	$	-	$	-
	Level 1:
	Money market funds			188			-		-		188		188		-		-
	Level 2:
	U.S. agency securities			37			-		-		37		-		10		27
	Certificates of deposit			10			-		-		10		-		7		3
	Corporate debt securities			87			-		-		87		-		34		53
	Subtotal			134			-		-		134		-		51		83
	Total		$	721		$	-	$	-	$	721	$	587	$	51	$	83
			31-Dec-13
												Cash and		Short-Term		Long-Term
			Amortized			Unrealized		Unrealized		Fair		Cash		Marketable		Marketable
			Cost			Gains		Losses		Value		Equivalents		Securities		Securities
	Cash		$	195		$	-	$	-	$	195	$	195	$	-	$	-
	Level 1:
	Money market funds			156			-		-		156		156		-		-
	Level 2:
	U.S. agency securities			37			-		-		37		-		14		23
	Certificates of deposit			23			-		-		23		-		16		7
	Commercial paper			5			-		-		5		-		5		-
	Corporate debt securities			254			-		-		254		-		96		158
	Subtotal			319			-		-		319		-		131		188
	Total		$	670		$	-	$	-	$	670	$	351	$	131	$	188
	Our cash and cash equivalents consist of cash on hand in global financial institutions, money market funds and marketable securities with maturities of 90 days or less at the date purchased. The remaining maturities of our long-term marketable securities range from one to three years and our short-term marketable securities include maturities that were greater than 90 days at the date purchased and have twelve months or less remaining at June 30, 2014.
	We classify our cash equivalents and marketable securities within Level 1 and Level 2 as we value our cash equivalents and marketable securities using quoted market prices (Level 1) or alternative pricing sources (Level 2). The valuation technique we used to measure the fair value of money market funds was derived from quoted prices in active markets for identical assets or liabilities. Fair values for our U.S. agency securities, commercial paper, corporate debt securities and certificates of deposit are considered “Level 2” valuations because they are obtained from pricing sources for identical or comparable instruments, rather than direct observations of quoted prices in active markets.
	There were no material realized gains or losses related to sales of our marketable securities for the three and six months ended June 30, 2014 and 2013, respectively.
	As of June 30, 2014, we had marketable securities with an aggregate fair value of $15 million currently in an unrealized loss position.  The gross unrealized loss amount was not material at June 30, 2014.  We consider the declines in market value of our marketable securities investment portfolio to be temporary in nature and do not consider any of our investments other-than-temporarily impaired. When evaluating an investment for other-than-temporary impairment, we review factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, and our intent to sell, or whether it is more likely than not we will be required to sell the investment before recovery of the investment’s cost basis. During the three and six months ended June 30, 2014 and 2013, we did not recognize any impairment charges. We did not have any material investments in marketable securities that were in a continuous unrealized loss position for twelve months or greater at June 30, 2014 or December 31, 2013.
	Derivative Financial Instruments
	In the normal course of business, we are exposed to the impact of foreign currency fluctuations, which we attempt to mitigate through the use of derivative instruments. Accordingly, we have entered into forward contracts to reduce the effects of fluctuating foreign currency exchange rates on our cash flows denominated in foreign currencies. We do not use derivatives for trading or speculative purposes. In accordance with current accounting guidance on derivative instruments and hedging activities, we record all our derivative instruments as either an asset or liability measured at their fair value. Our derivative instruments are typically short-term in nature.
	Our current forward contracts are not designated as hedges. Consequently, any gain or loss resulting from the change in fair value is recognized in the current period earnings. These gains or losses are offset by the exposure related to receivables and payables with our foreign subsidiaries and were not material for the three and six months ended June 30, 2014 and 2013, and are included in interest income and other, net on our unaudited consolidated statements of operations. The net cash received or paid related to our derivative instruments are classified as operating in our unaudited consolidated statements of cash flows, which is based on the objective of the derivative instruments.
	The following table shows the notional principal amounts of our outstanding derivative instruments for the periods presented:
		June 30,			December 31,
		2014			2013
		(in millions)
	Foreign exchange-forward contracts (1)(2)	$	6		$	5
	-1	Derivative contracts address foreign exchange fluctuations for the Euro versus the U.S. Dollar.
	-2	The fair value of our derivatives are not material for all periods presented and are reported as liabilities in accrued and other current liabilities on our unaudited consolidated balance sheets. We measure the fair value of our outstanding or unsettled derivatives using Level 2 fair value inputs, as we use a pricing model that takes into account the contract terms as well as current foreign currency exchange rates in active markets.
	Concentration of Credit Risk
	Counterparties to currency exchange derivatives consist of major international financial institutions. We monitor our positions and the credit ratings of the counterparties involved and, by policy limits, the amount of credit exposure to any one party. While we may be exposed to potential losses due to the credit risk of non-performance by these counterparties, losses are not anticipated and any credit risk amounts associated with our outstanding or unsettled derivative instruments are deemed to be not material for any period presented.
	Other Financial Instruments
	Other financial instruments not measured at fair value on a recurring basis include trade receivables, trade payables, deferred merchant payables, short-term debt, accrued and other current liabilities and long-term debt. With the exception of long-term debt, the carrying amount approximates fair value because of the short maturity of these instruments as reported on our unaudited consolidated balance sheets as of June 30, 2014 and December 31, 2013. The carrying value of the long-term borrowings outstanding on our Credit Agreement bears interest at a variable rate and therefore is also considered to approximate fair value.
	We did not have any Level 3 assets or liabilities for the periods ended June 30, 2014 and December 31, 2013.

Property_and_Equipment_Net

Property and Equipment, Net	6 Months Ended
	Jun. 30, 2014
Property and Equipment, Net	'
	NOTE 6: PROPERTY AND EQUIPMENT, NET
	Property and equipment consists of the following for the periods presented:
			June 30,			December 31,
			2014			2013
			(in millions)
	Capitalized software and website development		$	96		$	73
	Leasehold improvements			36			22
	Computer equipment			29			21
	Furniture, office equipment and other			8			6
				169			122
	Less: accumulated depreciation			(68	)		(48	)
	Construction in progress (1)			40			8
	Property and equipment, net		$	141		$	82
	-1	We capitalize construction in progress for build-to-suit lease agreements where we are considered the owner, for accounting purposes only, during the construction period.  These amounts represent construction costs to date incurred by the landlord and the Company related to our future corporate headquarters in Needham, MA. During the six months ended June 30, 2014 we capitalized $28 million in non-cash construction costs which were incurred by the landlord, with a corresponding liability recorded in other long-term liabilities on our unaudited consolidated balance sheet. Refer to “Note 12 – Commitments and Contingencies,” in  the Notes to our Consolidated  Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013 for additional information on our future corporate headquarters lease.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets, Net	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets, Net	'
	NOTE 7: GOODWILL AND INTANGIBLE ASSETS, NET
	The change in goodwill for the six months ended June 30, 2014 consists of the following:
			Total
			(in millions)
	Beginning balance as of January 1, 2014		$	502
	Additions (1)			105
	Ending balance as of June 30, 2014		$	607
	-1	The additions to goodwill relate to our 2014 business acquisitions. See “Note 3— Acquisitions” above, for further information.
	Intangible assets, which were acquired in business combinations and recorded at fair value on the date of purchase, consist of the following:
			June 30,			December 31,
			2014			2013
			(in millions)
	Intangible assets with definite lives		$	101		$	36
	Less: accumulated amortization			(18	)		(14	)
	Intangible assets with definite lives, net			83			22
	Intangible assets with indefinite lives			30			30
			$	113		$	52
	The following table presents the components of our intangible assets with definite lives:
						30-Jun-14								December 31, 2013
			Weighted Average			Gross						Net		Gross					Net
			Remaining Life			Carrying			Accumulated			Carrying		Carrying		Accumulated			Carrying
			(in years)			Amount			Amortization			Amount		Amount		Amortization			Amount
						(in millions)								(in millions)
	Trade names and trademarks			9.4		$	29		$	(9	)	$	20	$	18	$	(7	)	$	11
	Subscriber and customer relationships			11.6			62			(8	)		54		14		(6	)		8
	Technology and other			4			10			(1	)		9		4		(1	)		3
	Total			10.3		$	101		$	(18	)	$	83	$	36	$	(14	)	$	22
	Intangible assets with definite lives are amortized on a straight-line basis. The estimated amortization expense for intangible assets with definite lives for the remainder of 2014, the annual expense for the next five years, and the expense thereafter, assuming no subsequent impairment of the underlying assets, is expected to be as follows (in millions):
	2014 (remaining six months)		$	6
	2015			10
	2016			10
	2017			9
	2018			9
	2019 and thereafter			39
	Total		$	83

Debt

Debt	6 Months Ended
	Jun. 30, 2014
Debt	'
	NOTE 8: DEBT
	Term Loan Facility Due 2016 and Revolving Credit Facility
	On December 20, 2011, we entered into a credit agreement, by and among TripAdvisor, TripAdvisor Holdings, LLC, and TripAdvisor LLC, the lenders party thereto, JPMorgan Chase Bank, N.A., as administrative agent, and J.P. Morgan Europe Limited, as London agent (this credit agreement, together with all exhibits, schedules, annexes, certificates, assignments and related documents contemplated thereby, is referred to herein as the “Credit Agreement”), which provides $600 million of borrowing including:
	—	the Term Loan Facility (“Term Loan”) in an aggregate principal amount of $400 million with a term of five years due December 2016; and
	—	the Revolving Credit Facility in an aggregate principal amount of $200 million available in U.S. dollars, Euros and British pound sterling with a term of five years expiring December 2016.
	The Term Loan and any loans under the Revolving Credit Facility bear interest by reference to a base rate or a Eurocurrency rate, in either case plus an applicable margin based on our leverage ratio. We are also required to pay a quarterly commitment fee, on the average daily unused portion of the Revolving Credit Facility for each fiscal quarter and fees in connection with the issuance of letters of credit. The Term Loan and loans under the Revolving Credit Facility currently bear interest at LIBOR plus 150 basis points, or the Eurocurrency Spread, or the alternate base rate (“ABR”) plus 50 basis points, and undrawn amounts are currently subject to a commitment fee of 22.5 basis points. As of June 30, 2014 we are using a one-month interest period Eurocurrency Spread which is approximately 1.7% per annum. Interest is currently payable on a monthly basis while we are borrowing under the one-month interest rate period. The current interest rates are based on current assumptions, leverage and LIBOR rates and do not take into account that rates will reset periodically.
	The Term Loan principal is currently repayable in quarterly installments on the last day of each calendar quarter equal to 2.5% of the original principal amount with the balance due on the final maturity date. Principal payments aggregating $20 million were made during the six months ended June 30, 2014.
	The Revolving Credit Facility includes $40 million of borrowing capacity available for letters of credit and $40 million for borrowings on same-day notice. As of June 30, 2014 there are no outstanding borrowings under our Revolving Credit Facility.
	During the three and six months ended June 30, 2014, we recorded total interest and commitment fees on our Credit Agreement of $2 million and $3 million, respectively, to interest expense on our unaudited consolidated statements of operations.  During the three and six months ended June 30, 2013, we recorded total interest and commitment fees on our Credit Agreement of $2 million and $4 million, respectively, to interest expense on our unaudited consolidated statements of operations.  All unpaid interest and commitment fee amounts as of June 30, 2014 and December 31, 2013 were not material.
	Total outstanding borrowings under the Credit Agreement consist of the following:
			June 30,		December 31,
			2014		2013
			(in millions)
	Short-Term Debt:
	Term Loan		$	40	$	40
	Total Short-Term Borrowings		$	40	$	40
	Long-Term Debt:
	Term Loan		$	280	$	300
	Total Long-Term Borrowings		$	280	$	300
	As of June 30, 2014, we are in compliance with all of our debt covenants.
	Chinese Credit Facilities
	In addition to our borrowings under the Credit Agreement, we maintain our Chinese Credit Facilities. As of June 30, 2014 and December 31, 2013, we had short-term borrowings outstanding of $33 million and $28 million, respectively.
	Certain of our Chinese subsidiaries entered into a RMB 189,000,000 (approximately $30 million), one-year revolving credit facility with Bank of America (the “Chinese Credit Facility—BOA”) that is currently subject to review on a periodic basis with no-specific expiration period. We had $14 million of outstanding borrowings from the Chinese Credit Facility—BOA as of June 30, 2014. Our Chinese Credit Facility—BOA currently bears interest at a rate based on 100% of the People’s Bank of China’s base rate, which was 5.6% as of June 30, 2014.
	In addition, during April 2014, certain of our Chinese subsidiaries renewed a RMB 125,000,000 (approximately $20 million) one-year revolving credit facility with J.P. Morgan Chase Bank (“Chinese Credit Facility—JPM”). We had $19 million of outstanding borrowings from the Chinese Credit Facility—JPM as of June 30, 2014. Our Chinese Credit Facility—JPM currently bears interest at a rate based on 100% of the People’s Bank of China’s base rate, which was 5.6% as of June 30, 2014.

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Taxes	'
	NOTE 9: INCOME TAXES
	Each interim period is considered an integral part of the annual period and, accordingly, we measure our tax expense using an estimated annual effective tax rate. An enterprise is required, at the end of each interim reporting period, to make its best estimate of the annual effective tax rate for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis, as adjusted for discrete taxable events that occur during the interim period.
	Our effective tax rate for the three and six months ended June 30, 2014 was 30.6% and 29.2%, respectively. Our effective tax rate for the three and six months ended June 30, 2013 was 25.6% and 25.9%, respectively. For the three and six months ended June 30, 2014, the effective tax rate is less than the federal statutory rate primarily due to earnings in jurisdictions outside the United States, where our effective tax rate is lower, which was partially offset by state income taxes, non-deductible stock compensation and accruals on uncertain tax positions. The increase in the effective tax rate for 2014 compared to the 2013 rate was primarily due to a change in jurisdictional earnings and certain discrete items.
	Our policy is to recognize accrued interest and penalties related to unrecognized tax benefits and income tax liabilities as part of our income tax expense. As of June 30, 2014, accrued interest is $1 million, net of federal benefit, and no penalties have been accrued. We do not anticipate any material releases in the next twelve months.
	We are routinely under audit by federal, state and foreign tax authorities. By virtue of previous consolidated income tax returns filed with Expedia, we are currently under an IRS audit for the 2009 and 2010 tax years, and have various ongoing state income tax audits. As of June 30, 2014, no material assessments have resulted from these audits. These audits include questioning the timing and the amount of income and deductions and the allocation of income among various tax jurisdictions. Annual tax provisions include amounts considered sufficient to pay assessments that may result from the examination of prior year returns. We are no longer subject to tax examinations by tax authorities for years prior to 2007.

Other_LongTerm_Liabilities

Other Long-Term Liabilities	6 Months Ended
	Jun. 30, 2014
Other Long-Term Liabilities	'
	NOTE 10: OTHER LONG-TERM LIABILITIES
	Other long-term liabilities consisted of the following for the periods presented:
			June 30,		December 31,
			2014		2013
			(in millions)
	Unrecognized tax benefits (1)		$	58	$	38
	Construction liabilities (2)			36		8
	Other (3)			17		6
	Total other long-term liabilities		$	111	$	52
	-1	Amount includes accrued interest related to this liability.
	-2	We capitalize construction in progress and record a corresponding long-term liability for build-to-suit lease agreements where we are considered the owner during the construction period for accounting purposes only.
	-3	Amounts primarily consist of long term deferred rent balances related to operating leases for office space.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies	'
	NOTE 11: COMMITMENTS AND CONTINGENCIES
	There have been no material changes to our commitments and contingencies since December 31, 2013. Refer to “Note 12— Commitments and Contingencies,” in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013.
	In the ordinary course of business, we and our subsidiaries are parties to legal proceedings and claims involving alleged infringement of third-party intellectual property rights, defamation, and other claims. Rules of the SEC require the description of material pending legal proceedings, other than ordinary, routine litigation incident to the registrant’s business, and advise that proceedings ordinarily need not be described if they primarily involve damages claims for amounts (exclusive of interest and costs) not individually exceeding 10% of the current assets of the registrant and its subsidiaries on a consolidated basis. In the judgment of management, none of the pending litigation matters that we and our subsidiaries are defending involves or is likely to involve amounts of that magnitude. There may be claims or actions pending or threatened against us of which we are currently not aware and the ultimate disposition of which could have a material adverse effect on us.

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2014
Stockholders' Equity	'
	NOTE 12: STOCKHOLDERS’ EQUITY
	Preferred Stock
	In addition to common stock, we are authorized to issue up to 100 million preferred shares, with $ 0.001 par value per share, with terms determined by our Board of Directors, without further action by our stockholders. At June 30, 2014, no preferred shares had been issued.
	Common Stock and Class B Common Stock
	Our authorized common stock consists of 1.6 billion shares of common stock with par value of $0.001 per share, and 400 million shares of Class B common stock with par value of $0.001 per share. Both classes of common stock qualify for and share equally in dividends, if declared by our Board of Directors. Common stock is entitled to one vote per share and Class B common stock is entitled to 10 votes per share on most matters. Holders of TripAdvisor common stock, acting as a single class, are entitled to elect a number of directors equal to 25% of the total number of directors, rounded up to the next whole number, which was three directors as of June 30, 2014. Class B common stockholders may, at any time, convert their shares into common stock, on a one for one share basis. Upon conversion, the Class B common stock is retired and is not available for reissue. In the event of liquidation, dissolution, distribution of assets or winding-up of TripAdvisor, the holders of both classes of common stock have equal rights to receive all the assets of TripAdvisor after the rights of the holders of the preferred stock have been satisfied. There were 132,091,353 and 129,970,644 shares of common stock issued and outstanding, respectively, at June 30, 2014.  There were also 12,799,999 shares of Class B common stock issued and outstanding at June 30, 2014.
	Accumulated Other Comprehensive Income
	Accumulated other comprehensive income primarily relates to cumulative foreign currency translation adjustments and was not material at June 30, 2014 and December 31, 2013.
	Treasury Stock
	On February 15, 2013, our Board of Directors authorized the repurchase of $250 million of our shares of common stock under a share repurchase program. We have in the past, and intend to use in the future, available cash from operations to fund repurchases under the share repurchase program. The repurchase program has no expiration date but may be suspended or terminated by the Board of Directors at any time. Our Board of Directors will determine the price, timing, amount and method of such repurchases based on its evaluation of market conditions and other factors, and any shares repurchased will be in compliance with applicable legal requirements, at prices determined to be attractive and in the best interests of both the Company and its stockholders.
	During the six months ended June 30, 2014, we did not repurchase any shares of our outstanding common stock under the share repurchase program.  As of June 30, 2014, from the authorized share repurchase program granted by the Board of Directors, we have repurchased 2,120,709 shares of our outstanding common stock and have $105 million remaining to repurchase shares of our common stock.
	Dividends
	During the period January 1, 2014 through June 30, 2014, our Board of Directors did not declare any dividends on our outstanding common stock and do not expect to pay any dividends for the foreseeable future.

Segment_Information

Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Information	'
	NOTE 13: SEGMENT INFORMATION
	We have one operating and reportable segment: TripAdvisor. We determined our segment based on how our chief operating decision maker manages our business, makes operating decisions, evaluates operating performance and allocates resources. The chief operating decision maker for the Company is our Chief Executive Officer.
	Our primary operating metric for evaluating segment performance is Adjusted EBITDA, which is a non-GAAP financial measure. We define Adjusted EBITDA as net income (loss) plus: (1) provision for income taxes; (2) other (income) expense, net; (3) depreciation of property and equipment, including amortization of internal use software and website development; (4) amortization of intangible assets; (5) stock-based compensation; and (6) non-recurring expenses. Such amounts are detailed in our segment reconciliation below. In addition, please see our discussion of Adjusted EBITDA in the section entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” below.
	The following table is a reconciliation of Adjusted EBITDA to net income, the most directly comparable financial measure calculated and presented in accordance with GAAP, for the periods presented:
			Three months ended						Six months ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in millions)						(in millions)
	Adjusted EBITDA		$	129		$	113		$	251		$	222
	Depreciation (1)			(11	)		(7	)		(21	)		(13	)
	OIBA (2)			118			106			230			209
	Amortization of intangible assets			(3	)		(2	)		(5	)		(3	)
	Stock-based compensation			(15	)		(10	)		(29	)		(24	)
	Other expense, net			(2	)		(4	)		(4	)		(8	)
	Provision for income taxes			(30	)		(23	)		(56	)		(45	)
	Net income		$	68		$	67		$	136		$	129
	-1	Includes amortization of internal use software and website development costs.
	-2	We define OIBA as net income (loss) plus: (1) provision for income taxes; (2) other (income) expense, net; (3) stock-based compensation; (4) amortization of intangible assets; and (5) non-recurring expenses. This operating metric is only used by our management to calculate our annual obligation for our charitable foundation. Refer to “Note 12— Commitments and Contingencies,” in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013 for information regarding our charitable foundation.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share	'
	NOTE 14: EARNINGS PER SHARE
	Basic Earnings Per Share Attributable to Common Stockholders
	We compute basic earnings per share (“Basic EPS”) by dividing net income attributable to TripAdvisor by the weighted average number of common shares outstanding during the period. For the three and six months ended June 30, 2014 and 2013, we computed the weighted average number of common shares outstanding during the period using the total of common stock and Class B common stock outstanding as of December 31, 2013 and 2012, respectively, plus the weighted average of any additional shares issued and outstanding during the three and six months ended June 30, 2014 and 2013, respectively.
	Diluted Earnings Per Share Attributable to Common Stockholders
	We compute diluted earnings per share (“Diluted EPS”), by dividing net income attributable to TripAdvisor by the sum of the weighted average number of common and common equivalent shares outstanding during the period. For the three and six months ended June 30, 2014 and 2013, we computed the weighted average number of common and common equivalent shares outstanding during the period using the sum of (i) the number of shares of common stock and Class B common stock used in the Basic EPS calculation as indicated above, (ii) if dilutive, the incremental weighted average common stock that we would issue upon the assumed exercise of common equivalent shares related to stock options and the vesting of restricted stock units using the treasury stock method during the three and six months ended June 30, 2014 and 2013, respectively, and (iii) if dilutive, performance based awards based on the number of shares that would be issuable as of the end of the reporting period assuming the end of the reporting period was also the end of the contingency period.
	Under the treasury stock method, the assumed proceeds calculation includes the actual proceeds to be received from the employee upon exercise, the average unrecognized compensation cost during the period and any tax benefits credited upon exercise to additional paid-in-capital. The treasury stock method assumes that a company uses the proceeds from the exercise of an award to repurchase common stock at the average market price for the period. Windfall tax benefits created upon the exercise of an award would be added to assumed proceeds, while shortfalls charged to additional paid-in-capital would be deducted from assumed proceeds. Any shortfalls not covered by the windfall tax pool would be charged to the income statement and would be excluded from the calculation of assumed proceeds, if any.
	Below is a reconciliation of the weighted average number of shares of common stock outstanding in calculating Diluted EPS (shares in thousands and dollars in millions, except per share amounts):
			Three months ended				Six months ended
			June 30,				June 30,
			2014		2013		2014		2013
	Numerator:
	Net income		$	68	$	67	$	136	$	129
	Denominator:
	Weighted average shares used to compute Basic EPS			142,701		143,531		142,550		143,297
	Weighted average effect of dilutive securities:
	Stock options			2,777		1,940		2,831		1,671
	RSUs			304		193		343		192
	Weighted average shares used to compute Diluted EPS			145,782		145,664		145,724		145,160
	Basic EPS		$	0.48	$	0.47	$	0.95	$	0.9
	Diluted EPS		$	0.47	$	0.46	$	0.93	$	0.89
	The following potential common shares related to stock options and RSUs were excluded from the calculation of Diluted EPS because their effect would have been anti-dilutive for the periods presented (in thousands):
			Three months ended				Six months ended
			June 30,				June 30,
			2014(1)		2013(2)		2014(1)		2013(2)
	Stock options			1,689		1,741		1,688		3,159
	RSUs			55		48		247		24
	Total			1,744		1,789		1,935		3,183
	-1	These totals do not include 66,666 performance based options and 44,000 performance based RSUs representing the right to acquire 110,666 shares of common stock for which all targets required to trigger vesting have not been achieved as of June 30, 2014; therefore, such awards were excluded from the calculation of weighted average shares used to compute Diluted EPS for those reporting periods.
	-2	These totals do not include 210,000 performance based options and 44,000 performance based RSUs representing the right to acquire 254,000 shares of common stock for which all targets required to trigger vesting had not been achieved as of June 30, 2013; therefore, such awards were excluded from the calculation of weighted average shares used to compute Diluted EPS for those reporting periods.
	The earnings per share amounts are the same for common stock and Class B common stock because the holders of each class are legally entitled to equal per share distributions whether through dividends or in liquidation.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions	'
	NOTE 15: RELATED PARTY TRANSACTIONS
	Liberty Interactive Corporation
	As of June 30, 2014, Liberty Interactive Corporation (“Liberty”) beneficially owned 18,159,752 shares of our common stock and 12,799,999 shares of our Class B common stock, which shares constitute 14.0% of the outstanding shares of Common Stock and 100% of the outstanding shares of Class B Common Stock. Assuming the conversion of all of Liberty’s shares of Class B common stock into common stock, Liberty would beneficially own 21.7% of the outstanding common stock (calculated in accordance with Rule 13d-3). Because each share of Class B common stock generally is entitled to ten votes per share and each share of common stock is entitled to one vote per share, Liberty may be deemed to beneficially own equity securities representing approximately 56.7% of our voting power.
	We had no material related party transactions with Liberty during the three and six months ended June 30, 2014 and 2013, respectively.

Subsequent_Events

Subsequent Events	6 Months Ended
	Jun. 30, 2014
Subsequent Events	'
	NOTE 16: SUBSEQUENT EVENT
	On July 24, 2014, the Company entered into an agreement to acquire Viator, Inc., which is headquartered in San Francisco, CA.  Viator is a leading resource for researching and booking destination activities around the world. Viator features more than 20,000 bookable tours and attractions and more than 600,000 reviews, photos, and videos submitted by travelers. Viator works with local operators to provide travelers with access to tours and activities in popular destinations worldwide. The purchase price for the transaction is approximately $200 million, subject to adjustment, and will be payable substantially in the form of cash. Subject to the completion of customary conditions, the acquisition is expected to close during the third quarter of 2014.   The Company intends to use available U.S.-based cash for this transaction.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Basis of Presentation	'
	Basis of Presentation
	We have prepared the accompanying unaudited consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”). We have included all adjustments necessary for a fair presentation of the results of the interim period. These adjustments consist of normal recurring items. We prepared the unaudited consolidated financial statements following the requirements of the U.S. Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, we have condensed or omitted certain footnotes or other financial information that are normally required by GAAP for annual financial statements. Our interim unaudited consolidated financial statements are not necessarily indicative of results that may be expected for any other interim period or for the full year. These interim unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2013, previously filed with the SEC.
Principles of Consolidation	'
	Principles of Consolidation
	These accompanying unaudited financial statements present our results of operations, financial position and cash flows on a consolidated basis. The accompanying unaudited consolidated financial statements include TripAdvisor, our wholly-owned subsidiaries, and entities we control, or in which we have a variable interest and are the primary beneficiary of expected cash profits or losses. We have eliminated significant intercompany transactions and accounts.
	Certain of our subsidiaries that operate in China have variable interests in affiliated entities in China in order to comply with Chinese laws and regulations, which restrict foreign investment in Internet content provision businesses. Although we do not own the capital stock of some of our Chinese affiliates, we consolidate their results as we are the primary beneficiary of the cash losses or profits of these variable interest affiliates and have the power to direct the activities of these affiliates. Our variable interest entities are not material for all periods presented.
Reclassifications	'
	Reclassifications
	Pursuant to our disclosure in “Note 15— Related Party Transactions” in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013, we no longer consider Expedia, Inc. ("Expedia”) a related party.    Certain reclassifications have been made to conform the prior period to the current presentation relating to Expedia transactions, which includes the reclassification of revenue from Expedia on our unaudited statements of operations to revenue and the reclassification of receivables from Expedia, net on our unaudited consolidated balance sheets to accounts receivable.   These reclassifications had no net effect on our unaudited consolidated financial statements.
	All other reclassifications, made to conform the prior period to the current presentation, were not material and had no net effect on our unaudited consolidated financial statements.
Accounting Estimates	'
	Accounting Estimates
	We use estimates and assumptions in the preparation of our unaudited consolidated financial statements in accordance with GAAP. Our estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of our unaudited consolidated financial statements. These estimates and assumptions also affect the reported amount of net income or loss during any period. Our actual financial results could differ significantly from these estimates. The significant estimates underlying our unaudited consolidated financial statements include recoverability of long-lived assets and investments, including intangible assets and goodwill; income taxes; purchase accounting for business combinations and stock-based compensation.
Seasonality	'
	Seasonality
	Expenditures by travel advertisers tend to be seasonal. Traditionally, our strongest quarter has been the third quarter, which is a key travel research period, with the weakest quarter being the fourth quarter. However, adverse economic conditions or continued growth of our international operations with differing holiday peaks may influence the typical trend of our seasonality in the future.
New Accounting Pronouncements Not Yet Adopted	'
	New Accounting Pronouncements Not Yet Adopted
	Revenue From Contracts With Customers
	In May 2014, the FASB issued new accounting guidance on revenue from contracts with customers.  The new guidance requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated guidance will replace most existing revenue recognition guidance in GAAP when it becomes effective and permits the use of either a retrospective or cumulative effect transition method. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016.  We have not yet selected a transition method and we are currently evaluating the effect that the updated standard will have on our unaudited consolidated financial statements and related disclosures.
Recently Adopted Accounting Pronouncements	'
	Recently Adopted Accounting Pronouncements
	Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists
	In July 2013, the FASB issued new accounting guidance on the presentation of unrecognized tax benefits. The new guidance requires an entity to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows: to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use the deferred tax asset for such purpose, then the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2013, with early adoption permitted. Accordingly, we adopted these presentation requirements during the first quarter of 2014. The adoption of this new guidance did not have a material impact on our unaudited consolidated financial statements and related disclosures.

Acquisitions_Tables

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2014
Summary of Purchase Price Allocation Initially Recorded on Consolidated Balance Sheet for All Acquisitions	'
	The following table presents the purchase price allocations initially recorded on our consolidated balance sheet on June 30, 2014 for all 2014 acquisitions (in millions):
		Total
	Net assets (1)	$	6
	Goodwill (2)		105
	Intangible assets (3)		66
	Deferred tax liabilities, net		(17	)
	Total purchase price consideration (4)	$	160
	-1	Includes cash acquired of $6 million.
	-2	The goodwill represents the excess value over both tangible and intangible assets acquired. The goodwill in these transactions is primarily attributable to expected operational synergies, potential new and expanded business relationships and user bases, the assembled workforces, and the future development initiatives of the assembled workforces. Goodwill in the amount of $4 million is expected to be deductible for tax purposes.
	-3	Identifiable definite-lived intangible assets were comprised of developed technology of $6 million, trade names of $11 million, and subscriber and customer relationships of $49 million. The overall weighted-average life of the identifiable definite-lived intangible assets acquired in the purchase of the companies was 11.5 years, which will be amortized on a straight-line basis over their estimated useful lives.
	-4	Subject to adjustment based on final working capital adjustment calculations for Vacation Home Rentals and Lafourchette as of June 30, 2014.

Stock_Based_Awards_and_Other_E1

Stock Based Awards and Other Equity Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Amount of Stock-Based Compensation Expense Related to Stock-Based Awards, Primarily Stock Options and RSUs	'
	The following table presents the amount of stock-based compensation expense related to stock-based awards, primarily stock options and RSUs, on our unaudited consolidated statements of operations during the periods presented:
			Three months ended						Six months ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in millions)						(in millions)
	Selling and marketing		$	3		$	2		$	6		$	5
	Technology and content			6			4			12			10
	General and administrative			6			4			11			9
	Total stock-based compensation			15			10			29			24
	Income tax benefit from stock-based compensation			(6	)		(4	)		(11	)		(9	)
	Total stock-based compensation, net of tax effect		$	9		$	6		$	18		$	15
Summary of Status and Activity for Stock Option Awards Relating to Common Stock	'
	A summary of the status and activity for stock option awards relating to our common stock for the six months ended June 30, 2014, is presented below:
						Weighted			Weighted
						Average			Average
						Exercise			Remaining			Aggregate
			Options			Price Per			Contractual			Intrinsic
			Outstanding			Share			Life			Value
			(in thousands)						(in years)			(in millions)
	Options outstanding at January 1, 2014			9,470		$	40.18
	Granted			491			96.45
	Exercised (1)			(834	)		33.46
	Cancelled or expired			(217	)		44.99
	Options outstanding at June 30, 2014			8,910		$	43.79			5.5		$	578
	Exercisable as of June 30, 2014			3,984		$	31.79			3.2		$	306
	Vested and expected to vest after June 30, 2014			8,282		$	43.01			5.3		$	544
	-1	Inclusive of 432,283 options which were not converted into shares due to net share settlement in order to cover the aggregate exercise price and the minimum amount of required employee withholding taxes. Potential shares that had been convertible under stock options that were withheld under net share settlement remain in the authorized but unissued pool under the 2011 Plan and can be reissued by the Company. Total payments for the employees’ tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the unaudited consolidated statements of cash flows.
Weighted-Average Assumptions of Estimated Fair Value of Stock Option Grants	'
	The fair value of stock option grants under the 2011 Plan has been estimated at the date of grant using the Black–Scholes option pricing model with the following weighted average assumptions for the periods presented:
			Three months ended						Six months ended
			June 30,						June 30,
			2014			2013			2014			2013
	Risk free interest rate			1.98	%		1.07	%		1.97	%		1.07	%
	Expected term (in years)			6.25			6.25			6.38			6.25
	Expected volatility			47.32	%		51.82	%		48.07	%		51.73	%
	Expected dividend yield		—  %			—  %			—  %			—  %
Summary of RSU Activity on Common Stock	'
	The following table presents a summary of RSU activity on our common stock during the six months ended June 30, 2014:
						Weighted
						Average
						Grant-			Aggregate
			RSUs			Date Fair			Intrinsic
			Outstanding			Value Per Share			Value
			(in thousands)						(in millions)
	Unvested RSUs outstanding as of January 1, 2014			1,135		$	49.64
	Granted			513			96
	Vested and released (1)			(250	)		44.86
	Cancelled			(80	)		64.27
	Unvested RSUs outstanding as of June 30, 2014			1,318		$	67.69		$	143
	-1	Inclusive of 89,494 RSUs withheld to satisfy employee minimum tax withholding requirements due to net share settlement. Potential shares which had been convertible under RSUs that were withheld under net share settlement remain in the authorized but unissued pool under the 2011 Plan and can be reissued by the Company. Total payments for the employees’ tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the unaudited consolidated statements of cash flows.
Summary of Unrecognized Stock-Based Compensation Expense, Net of Estimated Forfeitures and Weighted Average Period Remaining	'
	A summary of our remaining unrecognized stock-based compensation expense, net of estimated forfeitures, and the weighted average remaining amortization period at June 30, 2014 related to our non-vested stock options and RSU awards is presented below (in millions):
			Stock
			Options			RSUs
	Unrecognized compensation expense (net of forfeitures)		$	91		$	55
	Weighted average period remaining (in years)			3			3.2

Financial_Instruments_Tables

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Schedule of Cash, Cash Equivalents and Marketable Securities	'
	The following tables show our cash and available-for-sale securities’ amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents or short and long-term marketable securities for the periods presented (in millions):
			30-Jun-14
												Cash and		Short-Term		Long-Term
			Amortized			Unrealized		Unrealized		Fair		Cash		Marketable		Marketable
			Cost			Gains		Losses		Value		Equivalents		Securities		Securities
	Cash		$	399		$	-	$	-	$	399	$	399	$	-	$	-
	Level 1:
	Money market funds			188			-		-		188		188		-		-
	Level 2:
	U.S. agency securities			37			-		-		37		-		10		27
	Certificates of deposit			10			-		-		10		-		7		3
	Corporate debt securities			87			-		-		87		-		34		53
	Subtotal			134			-		-		134		-		51		83
	Total		$	721		$	-	$	-	$	721	$	587	$	51	$	83
			31-Dec-13
												Cash and		Short-Term		Long-Term
			Amortized			Unrealized		Unrealized		Fair		Cash		Marketable		Marketable
			Cost			Gains		Losses		Value		Equivalents		Securities		Securities
	Cash		$	195		$	-	$	-	$	195	$	195	$	-	$	-
	Level 1:
	Money market funds			156			-		-		156		156		-		-
	Level 2:
	U.S. agency securities			37			-		-		37		-		14		23
	Certificates of deposit			23			-		-		23		-		16		7
	Commercial paper			5			-		-		5		-		5		-
	Corporate debt securities			254			-		-		254		-		96		158
	Subtotal			319			-		-		319		-		131		188
	Total		$	670		$	-	$	-	$	670	$	351	$	131	$	188
Fair Value and Notional Principal Amounts of Outstanding or Unsettled Derivative Instruments	'
	The following table shows the notional principal amounts of our outstanding derivative instruments for the periods presented:
		June 30,			December 31,
		2014			2013
		(in millions)
	Foreign exchange-forward contracts (1)(2)	$	6		$	5
	-1	Derivative contracts address foreign exchange fluctuations for the Euro versus the U.S. Dollar.
	-2	The fair value of our derivatives are not material for all periods presented and are reported as liabilities in accrued and other current liabilities on our unaudited consolidated balance sheets. We measure the fair value of our outstanding or unsettled derivatives using Level 2 fair value inputs, as we use a pricing model that takes into account the contract terms as well as current foreign currency exchange rates in active markets.

Property_and_Equipment_Net_Tab

Property and Equipment, Net (Tables)	6 Months Ended
	Jun. 30, 2014
Property and Equipment, Net	'
	Property and equipment consists of the following for the periods presented:
			June 30,			December 31,
			2014			2013
			(in millions)
	Capitalized software and website development		$	96		$	73
	Leasehold improvements			36			22
	Computer equipment			29			21
	Furniture, office equipment and other			8			6
				169			122
	Less: accumulated depreciation			(68	)		(48	)
	Construction in progress (1)			40			8
	Property and equipment, net		$	141		$	82
	-1	We capitalize construction in progress for build-to-suit lease agreements where we are considered the owner, for accounting purposes only, during the construction period.  These amounts represent construction costs to date incurred by the landlord and the Company related to our future corporate headquarters in Needham, MA. During the six months ended June 30, 2014 we capitalized $28 million in non-cash construction costs which were incurred by the landlord, with a corresponding liability recorded in other long-term liabilities on our unaudited consolidated balance sheet. Refer to “Note 12 – Commitments and Contingencies,” in  the Notes to our Consolidated  Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013 for additional information on our future corporate headquarters lease.

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets, Net (Tables)	6 Months Ended
	Jun. 30, 2014
Summary of Changes in Goodwill	'
	The change in goodwill for the six months ended June 30, 2014 consists of the following:
			Total
			(in millions)
	Beginning balance as of January 1, 2014		$	502
	Additions (1)			105
	Ending balance as of June 30, 2014		$	607
	-1	The additions to goodwill relate to our 2014 business acquisitions. See “Note 3— Acquisitions” above, for further information.
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	'
	Intangible assets, which were acquired in business combinations and recorded at fair value on the date of purchase, consist of the following:
			June 30,			December 31,
			2014			2013
			(in millions)
	Intangible assets with definite lives		$	101		$	36
	Less: accumulated amortization			(18	)		(14	)
	Intangible assets with definite lives, net			83			22
	Intangible assets with indefinite lives			30			30
			$	113		$	52
Components of Intangible Assets with Definite Lives	'
	The following table presents the components of our intangible assets with definite lives:
						30-Jun-14								December 31, 2013
			Weighted Average			Gross						Net		Gross					Net
			Remaining Life			Carrying			Accumulated			Carrying		Carrying		Accumulated			Carrying
			(in years)			Amount			Amortization			Amount		Amount		Amortization			Amount
						(in millions)								(in millions)
	Trade names and trademarks			9.4		$	29		$	(9	)	$	20	$	18	$	(7	)	$	11
	Subscriber and customer relationships			11.6			62			(8	)		54		14		(6	)		8
	Technology and other			4			10			(1	)		9		4		(1	)		3
	Total			10.3		$	101		$	(18	)	$	83	$	36	$	(14	)	$	22
Summary of Estimated Future Amortization Expense Related to Intangible Assets with Definite Lives	'
	Intangible assets with definite lives are amortized on a straight-line basis. The estimated amortization expense for intangible assets with definite lives for the remainder of 2014, the annual expense for the next five years, and the expense thereafter, assuming no subsequent impairment of the underlying assets, is expected to be as follows (in millions):
	2014 (remaining six months)		$	6
	2015			10
	2016			10
	2017			9
	2018			9
	2019 and thereafter			39
	Total		$	83

Debt_Tables

Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Summary of Total Outstanding Borrowings	'
	Total outstanding borrowings under the Credit Agreement consist of the following:
		June 30,		December 31,
		2014		2013
		(in millions)
	Short-Term Debt:
	Term Loan	$	40	$	40
	Total Short-Term Borrowings	$	40	$	40
	Long-Term Debt:
	Term Loan	$	280	$	300
	Total Long-Term Borrowings	$	280	$	300

Other_LongTerm_Liabilities_Tab

Other Long-Term Liabilities (Tables)	6 Months Ended
	Jun. 30, 2014
Schedule of Other Long-Term Liabilities	'
	Other long-term liabilities consisted of the following for the periods presented:
			June 30,		December 31,
			2014		2013
			(in millions)
	Unrecognized tax benefits (1)		$	58	$	38
	Construction liabilities (2)			36		8
	Other (3)			17		6
	Total other long-term liabilities		$	111	$	52
	-1	Amount includes accrued interest related to this liability.
	-2	We capitalize construction in progress and record a corresponding long-term liability for build-to-suit lease agreements where we are considered the owner during the construction period for accounting purposes only.
	-3	Amounts primarily consist of long term deferred rent balances related to operating leases for office space.

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Reconciliation of Adjusted EBITDA to Net Income	'
	The following table is a reconciliation of Adjusted EBITDA to net income, the most directly comparable financial measure calculated and presented in accordance with GAAP, for the periods presented:
			Three months ended						Six months ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in millions)						(in millions)
	Adjusted EBITDA		$	129		$	113		$	251		$	222
	Depreciation (1)			(11	)		(7	)		(21	)		(13	)
	OIBA (2)			118			106			230			209
	Amortization of intangible assets			(3	)		(2	)		(5	)		(3	)
	Stock-based compensation			(15	)		(10	)		(29	)		(24	)
	Other expense, net			(2	)		(4	)		(4	)		(8	)
	Provision for income taxes			(30	)		(23	)		(56	)		(45	)
	Net income		$	68		$	67		$	136		$	129
	-1	Includes amortization of internal use software and website development costs.
	-2	We define OIBA as net income (loss) plus: (1) provision for income taxes; (2) other (income) expense, net; (3) stock-based compensation; (4) amortization of intangible assets; and (5) non-recurring expenses. This operating metric is only used by our management to calculate our annual obligation for our charitable foundation. Refer to “Note 12— Commitments and Contingencies,” in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013 for information regarding our charitable foundation.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Reconciliation of Weighted Average Number of Shares of Common Stock Outstanding	'
	Below is a reconciliation of the weighted average number of shares of common stock outstanding in calculating Diluted EPS (shares in thousands and dollars in millions, except per share amounts):
			Three months ended				Six months ended
			June 30,				June 30,
			2014		2013		2014		2013
	Numerator:
	Net income		$	68	$	67	$	136	$	129
	Denominator:
	Weighted average shares used to compute Basic EPS			142,701		143,531		142,550		143,297
	Weighted average effect of dilutive securities:
	Stock options			2,777		1,940		2,831		1,671
	RSUs			304		193		343		192
	Weighted average shares used to compute Diluted EPS			145,782		145,664		145,724		145,160
	Basic EPS		$	0.48	$	0.47	$	0.95	$	0.9
	Diluted EPS		$	0.47	$	0.46	$	0.93	$	0.89
Common Shares Related to Stock Options and RSUs Excluded from Calculated Diluted Net Income Per Share	'
	The following potential common shares related to stock options and RSUs were excluded from the calculation of Diluted EPS because their effect would have been anti-dilutive for the periods presented (in thousands):
			Three months ended				Six months ended
			June 30,				June 30,
			2014(1)		2013(2)		2014(1)		2013(2)
	Stock options			1,689		1,741		1,688		3,159
	RSUs			55		48		247		24
	Total			1,744		1,789		1,935		3,183
	-1	These totals do not include 66,666 performance based options and 44,000 performance based RSUs representing the right to acquire 110,666 shares of common stock for which all targets required to trigger vesting have not been achieved as of June 30, 2014; therefore, such awards were excluded from the calculation of weighted average shares used to compute Diluted EPS for those reporting periods.
	-2	These totals do not include 210,000 performance based options and 44,000 performance based RSUs representing the right to acquire 254,000 shares of common stock for which all targets required to trigger vesting had not been achieved as of June 30, 2013; therefore, such awards were excluded from the calculation of weighted average shares used to compute Diluted EPS for those reporting periods.

Organization_Business_Descript1

Organization, Business Description and Basis of Presentation - Additional Information (Details)	6 Months Ended
	Jun. 30, 2014
	Segment
	Country
	Brand
Description Of Business And Basis Of Presentation [Line Items]	'
Number of countries with localized versions of website	41
Number of other travel brands with websites	23
Number of reportable segment	1

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Details) (Series of Individually Immaterial Business Acquisitions, USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
	Property
	Business
Series of Individually Immaterial Business Acquisitions	'
Business Acquisition [Line Items]	'
Number of business acquired	3
Total purchase price consideration	$152
Number of properties featured	14,000
Acquisition-related costs	$1

Acquisitions_Summary_of_Purcha

Acquisitions - Summary of Purchase Price Allocation Initially Recorded on Consolidated Balance Sheet for all Acquisitions (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Business Acquisition [Line Items]	'		'
Goodwill	$607		$502
Series of Individually Immaterial Business Acquisitions	'		'
Business Acquisition [Line Items]	'		'
Net assets	6	[1]	'
Goodwill	105	[2]	'
Intangible assets	66	[3]	'
Deferred tax liabilities, net	-17		'
Total purchase price consideration	$160	[4]	'
[1]	(1)Includes cash acquired of $6 million.
[2]	(2)The goodwill represents the excess value over both tangible and intangible assets acquired. The goodwill in these transactions is primarily attributable to expected operational synergies, potential new and expanded business relationships and user bases, the assembled workforces, and the future development initiatives of the assembled workforces. Goodwill in the amount of $4 million is expected to be deductible for tax purposes.
[3]	(3)Identifiable definite-lived intangible assets were comprised of developed technology of $6 million, trade names of $11 million, and subscriber and customer relationships of $49 million. The overall weighted-average life of the identifiable definite-lived intangible assets acquired in the purchase of the companies was 11.5 years, which will be amortized on a straight-line basis over their estimated useful lives.
[4]	Subject to adjustment based on final working capital adjustment calculations for Vacation Home Rentals and Lafourchette as of June 30, 2014.

Acquisitions_Summary_of_Purcha1

Acquisitions - Summary of Purchase Price Allocation Initially Recorded on Consolidated Balance Sheet for all Acquisitions (Parenthetical) (Details) (Series of Individually Immaterial Business Acquisitions, USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Business Acquisition [Line Items]	'
Cash acquired	$6
Goodwill expected to be deductible for tax purposes	4
Weighted average life of identifiable definite-lived intangible assets acquired	'11 years 6 months
Developed Technology	'
Business Acquisition [Line Items]	'
Identifiable definite-lived intangible assets	6
Trade Names	'
Business Acquisition [Line Items]	'
Identifiable definite-lived intangible assets	11
Customer Relationships	'
Business Acquisition [Line Items]	'
Identifiable definite-lived intangible assets	$49

Stock_Based_Awards_and_Other_E2

Stock Based Awards and Other Equity Instruments - Amount of Stock-Based Compensation Expense Related to Stock-Based Awards, Primarily Stock Options and RSUs (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$15	$10	$29	$24
Income tax benefit from stock-based compensation	-6	-4	-11	-9
Total stock-based compensation, net of tax effect	9	6	18	15
Selling and Marketing	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	3	2	6	5
Technology and Content	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	6	4	12	10
General and Administrative	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$6	$4	$11	$9

Stock_Based_Awards_and_Other_E3

Stock Based Awards and Other Equity Instruments - Additional Information (Details) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'
Number of stock options issued	491,000	'
Total intrinsic value	$51	$27
Total fair value of stock options vested	$24	$20
Stock Options	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'
Number of stock options issued	490,508	'
Term of stock options	'10 years	'
Stock options vest period	'4 years	'
Closing stock price	$108.66	'
Grant-date fair value per option	$47.25	$23.15
Restricted Stock Units (RSUs)	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'
Stock options vest period	'4 years	'
RSU's issued under incentive plan	512,884	'

Stock_Based_Awards_and_Other_E4

Stock Based Awards and Other Equity Instruments - Summary of Status and Activity for Stock Option Awards Relating to Common Stock (Details) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Options Outstanding	'
Options Outstanding, Beginning balance	9,470
Options Outstanding, Granted	491
Options Outstanding, Exercised	-834
Options Outstanding, Cancelled or expired	-217
Options Outstanding, Ending balance	8,910
Options Outstanding, Exercisable	3,984
Options Outstanding, Vested and expected to vest	8,282
Weighted Average Exercise Price per share	'
Options Outstanding, Weighted Average Exercise Price, Beginning Balance	$40.18
Options Granted, Weighted Average Exercise Price	$96.45
Options Exercised, Weighted Average Exercise Price	$33.46
Options Cancelled or expired, Weighted Average Exercise Price	$44.99
Options Outstanding, Weighted Average Exercise Price, Ending balance	$43.79
Options Exercisable, Weighted Average Exercise Price	$31.79
Options Vested and expected to vest, Weighted Average Exercise Price	$43.01
Weighted Average Remaining Contractual Life and Aggregate Intrinsic Value	'
Options Outstanding, Weighted Average Remaining Contractual Life	'5 years 6 months
Options Exercisable, Weighted Average Remaining Contractual Life	'3 years 2 months 12 days
Options Vested and expected to vest, Weighted Average Remaining Contractual Life	'5 years 3 months 18 days
Options Outstanding, Aggregate Intrinsic Value	$578
Options Exercisable, Aggregate Intrinsic Value	306
Options Vested and expected to vest, Aggregate Intrinsic Value	$544

Stock_Based_Awards_and_Other_E5

Stock Based Awards and Other Equity Instruments - Summary of Status and Activity for Stock Option Awards Relating to Common Stock (Parenthetical) (Details) (Stock Options)	6 Months Ended
	Jun. 30, 2014
Stock Options	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Options non converted into shares due to net share settlement	432,283

Stock_Based_Awards_and_Other_E6

Stock Based Awards and Other Equity Instruments - Weighted-Average Assumptions of Estimated Fair Value of Stock Option Grants (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Risk free interest rate	1.98%	1.07%	1.97%	1.07%
Expected term (in years)	'6 years 3 months	'6 years 3 months	'6 years 4 months 17 days	'6 years 3 months
Expected volatility	47.32%	51.82%	48.07%	51.73%
Expected dividend yield	'	'	'	'

Stock_Based_Awards_and_Other_E7

Stock Based Awards and Other Equity Instruments - Summary of RSU Activity on Common Stock (Details) (Restricted Stock Units (RSUs), USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Restricted Stock Units (RSUs)	'
RSUs outstanding	'
Unvested RSUs outstanding, Beginning balance	1,135
Unvested RSUs, Granted	513
Unvested RSUs, Vested and released	-250	[1]
Unvested RSUs, Cancelled	-80
Unvested RSUs outstanding, Ending balance	1,318
Weighted Average Grant-Date Fair Value Per Share	'
Unvested RSUs outstanding, Weighted Average Grant-Date Fair Value Per Share, Beginning balance	$49.64
Weighted Average Grant-Date Fair Value Per Share, Granted	$96
Weighted Average Grant-Date Fair Value Per Share, Vested and released	$44.86	[1]
Weighted Average Grant-Date Fair Value Per Share, Cancelled	$64.27
Unvested RSUs outstanding, Weighted Average Grant-Date Fair Value Per Share, Ending balance	$67.69
Aggregate Intrinsic Value	'
Unvested RSUs outstanding, Aggregate Intrinsic Value	$143
[1]	Inclusive of 89,494 RSUs withheld to satisfy employee minimum tax withholding requirements due to net share settlement. Potential shares which had been convertible under RSUs that were withheld under net share settlement remain in the authorized but unissued pool under the 2011 Plan and can be reissued by the Company. Total payments for the employeesb tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the unaudited consolidated statements of cash flows.

Stock_Based_Awards_and_Other_E8

Stock Based Awards and Other Equity Instruments - Summary of RSU Activity on Common Stock (Parenthetical) (Details) (Restricted Stock Units (RSUs))	6 Months Ended
	Jun. 30, 2014
Restricted Stock Units (RSUs)	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
RSUs withheld to satisfy minimum tax withholding requirements	89,494

Stock_Based_Awards_and_Other_E9

Stock Based Awards and Other Equity Instruments - Summary of Unrecognized Stock-Based Compensation Expense, Net of Estimated Forfeitures and Weighted Average Period Remaining (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Stock Options	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Unrecognized compensation expense (net of forfeitures), Stock Options	$91
Weighted average period remaining (in years)	'3 years
Restricted Stock Units (RSUs)	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Weighted average period remaining (in years)	'3 years 2 months 12 days
Unrecognized compensation expense (net of forfeitures), RSUs	$55

Financial_Instruments_Schedule

Financial Instruments - Schedule of Cash, Cash Equivalents and Marketable Securities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	$721	$670	'	'
Unrealized Gains	0	0	'	'
Unrealized Losses	0	0	'	'
Fair Value	721	670	'	'
Cash and cash equivalents	587	351	200	368
Short-Term Marketable Securities	51	131	'	'
Long-Term Marketable Securities	83	188	'	'
Cash	399	195	'	'
Money Market Funds	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Cash equivalents	188	156	'	'
Level 1 | Money Market Funds	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	188	156	'	'
Unrealized Gains	0	0	'	'
Unrealized Losses	0	0	'	'
Fair Value	188	156	'	'
Level 2	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	134	319	'	'
Unrealized Gains	0	0	'	'
Unrealized Losses	0	0	'	'
Fair Value	134	319	'	'
Short-Term Marketable Securities	51	131	'	'
Long-Term Marketable Securities	83	188	'	'
Level 2 | U.S. Agency Securities	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	37	37	'	'
Unrealized Gains	0	0	'	'
Unrealized Losses	0	0	'	'
Fair Value	37	37	'	'
Short-Term Marketable Securities	10	14	'	'
Long-Term Marketable Securities	27	23	'	'
Level 2 | Certificates of Deposit	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	10	23	'	'
Unrealized Gains	0	0	'	'
Unrealized Losses	0	0	'	'
Fair Value	10	23	'	'
Short-Term Marketable Securities	7	16	'	'
Long-Term Marketable Securities	3	7	'	'
Level 2 | Commercial Paper	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	'	5	'	'
Unrealized Gains	'	0	'	'
Unrealized Losses	'	0	'	'
Fair Value	'	5	'	'
Short-Term Marketable Securities	'	5	'	'
Level 2 | Corporate Debt Securities	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'
Amortized Cost	87	254	'	'
Unrealized Gains	0	0	'	'
Unrealized Losses	0	0	'	'
Fair Value	87	254	'	'
Short-Term Marketable Securities	34	96	'	'
Long-Term Marketable Securities	$53	$158	'	'

Financial_Instruments_Addition

Financial Instruments - Additional Information (Details) (USD $)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Amortized Cost And Fair Value Debt Securities [Abstract]	'	'	'	'
Financial instruments including money market funds maturities period	'	'90 days	'	'
Maximum maturities period of long-term marketable securities	'	'3 years	'	'
Minimum maturities period of long-term marketable securities	'	'1 year	'	'
Maximum maturities period of short-term marketable securities	'	'12 months	'	'
Minimum maturities period of short-term marketable securities	'	'90 days	'	'
Material realized gains or losses related to sales of marketable securities	$0	'	$0	'
Total fair value of marketable securities	15	15	'	'
Recognize impairment charges	0	'	0	'
Investments in marketable securities	$0	$0	'	$0

Financial_Instruments_Fair_Val

Financial Instruments - Fair Value and Notional Principal Amounts of Outstanding or Unsettled Derivative Instruments (Details) (Foreign Exchange Forward, USD $)	Jun. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Foreign Exchange Forward	'		'
Derivatives Fair Value [Line Items]	'		'
Foreign exchange-forward contracts	$6	[1],[2]	$5	[1],[2]
[1]	Derivative contracts address foreign exchange fluctuations for the Euro versus the U.S. Dollar.
[2]	The fair value of our derivatives are not material for all periods presented and are reported as liabilities in accrued and other current liabilities on our unaudited consolidated balance sheets. We measure the fair value of our outstanding or unsettled derivatives using Level 2 fair value inputs, as we use a pricing model that takes into account the contract terms as well as current foreign currency exchange rates in active markets

Property_and_Equipment_Net_Com

Property and Equipment, Net - Components of Property and Equipment (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Property Plant And Equipment [Line Items]	'		'
Property and equipment, gross	$169		$122
Less: accumulated depreciation	-68		-48
Construction in progress	40	[1]	8	[1]
Property and equipment, net	141		82
Capitalized Software and Website Development	'		'
Property Plant And Equipment [Line Items]	'		'
Property and equipment, gross	96		73
Leasehold Improvements	'		'
Property Plant And Equipment [Line Items]	'		'
Property and equipment, gross	36		22
Computer Equipment	'		'
Property Plant And Equipment [Line Items]	'		'
Property and equipment, gross	29		21
Furniture, Office Equipment and Other	'		'
Property Plant And Equipment [Line Items]	'		'
Property and equipment, gross	$8		$6
[1]	We capitalize construction in progress for build-to-suit lease agreements where we are considered the owner, for accounting purposes only, during the construction period. These amounts represent construction costs to date incurred by the landlord and the Company related to our future corporate headquarters in Needham, MA. During the six months ended June 30, 2014 we capitalized $28 million in non-cash construction costs which were incurred by the landlord, with a corresponding liability recorded in other long-term liabilities on our unaudited consolidated balance sheet. Refer to bNote 12 b Commitments and Contingencies,b in the Notes to our Consolidated Financial Statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2013 for additional information on our future corporate headquarters lease

Property_and_Equipment_Net_Add

Property and Equipment, Net - Additional Information (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Property Plant And Equipment [Line Items]	'
Capitalization of construction in-process related to build to suit lease obligation	$28

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets, Net - Summary of Changes in Goodwill (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Beginning balance as of January 1, 2014	$502
Additions	105	[1]
Ending balance as of June 30, 2014	$607
[1]	The additions to goodwill relate to our 2014 business acquisitions. See bNote 3b Acquisitionsb above, for further information.

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets, Net - Summary of Intangible Assets Acquired in Business Combinations (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Intangible assets with definite lives	$101	$36
Less: accumulated amortization	-18	-14
Intangible assets with definite lives, net	83	22
Intangible assets with indefinite lives	30	30
Intangible assets, net	$113	$52

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets, Net - Components of Intangible Assets with Definite Lives (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]	'	'
Weighted Average Remaining Life (in years)	'11 years 8 months 12 days	'
Gross Carrying Amount	$101	$36
Accumulated Amortization	-18	-14
Intangible assets with definite lives, net	83	22
Trade Names and Trademarks	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Weighted Average Remaining Life (in years)	'9 years 4 months 24 days	'
Gross Carrying Amount	29	18
Accumulated Amortization	-9	-7
Intangible assets with definite lives, net	20	11
Subscriber and Customer Relationships	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Weighted Average Remaining Life (in years)	'13 years 8 months 12 days	'
Gross Carrying Amount	62	14
Accumulated Amortization	-8	-6
Intangible assets with definite lives, net	54	8
Technology and Other	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Weighted Average Remaining Life (in years)	'4 years	'
Gross Carrying Amount	10	4
Accumulated Amortization	-1	-1
Intangible assets with definite lives, net	$9	$3

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets, Net - Summary of Estimated Future Amortization Expense Related to Intangible Assets with Definite Lives (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
2014 (remaining six months)	$6	'
2015	10	'
2016	10	'
2017	9	'
2018	9	'
2019 and thereafter	39	'
Intangible assets with definite lives, net	$83	$22

Debt_Term_Loan_Facility_Due_Tw

Debt - Term Loan Facility Due Twenty Sixteen and Revolving Credit Facility - Additional Information (Details) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended
	Dec. 20, 2011	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Debt Instrument [Line Items]	'	'	'	'	'
Borrowings, interest rate description	'	'	'	'interest at LIBOR plus 150 basis points, or the Eurocurrency Spread, or the alternate base rate (bABRb) plus 50 basis points	'
Commitment fee on undrawn amount	'	'	'	0.23%	'
Principal repayment of term loan	'	'	'	2.50%	'
Principal payments on long-term debt	'	'	'	$20,000,000	$20,000,000
Total interest and commitments fees	'	2,000,000	2,000,000	4,000,000	5,000,000
London Interbank Offered Rate (LIBOR)	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Borrowings interest rate basis point	'	'	'	1.50%	'
Alternate Base Rate	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Borrowings interest rate basis point	'	'	'	0.50%	'
Term Loan	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Maximum borrowing limits	600,000,000	'	'	'	'
Term Loan Facility, principal amount	400,000,000	'	'	'	'
Period of Term Loan Facility	'5 years	'	'	'	'
Borrowings, maturity date	31-Dec-16	'	'	'	'
Borrowings, interest rate basis	'	1.70%	'	1.70%	'
Total interest and commitments fees	'	2,000,000	2,000,000	3,000,000	4,000,000
Revolving Credit Facility	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Borrowings, maturity date	31-Dec-16	'	'	'	'
Borrowing capacity under Credit Facility	200,000,000	'	'	'	'
Credit facility, expiration period	'5 years	'	'	'	'
Letter of Credit	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Borrowing capacity under Credit Facility	'	40,000,000	'	40,000,000	'
Borrowings On Same Day Notice	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'
Borrowing capacity under Credit Facility	'	$40,000,000	'	$40,000,000	'

Debt_Summary_of_Total_Outstand

Debt - Summary of Total Outstanding Borrowings (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Short-Term Debt:	'	'
Total Short-Term Borrowings	$40	$40
Long-Term Debt:	'	'
Total Long-Term Borrowings	280	300
Term Loan	'	'
Short-Term Debt:	'	'
Total Short-Term Borrowings	40	40
Long-Term Debt:	'	'
Total Long-Term Borrowings	$280	$300

Debt_Chinese_Credit_Facilities

Debt - Chinese Credit Facilities - Additional Information (Details)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Apr. 30, 2014	Apr. 30, 2014
	USD ($)	USD ($)	Chinese Credit Facility	Chinese Credit Facility	Chinese Credit Facility-BOA	Chinese Credit Facility-BOA	Chinese Credit Facility-JPM	Chinese Credit Facility-JPM	Chinese Credit Facility-JPM
			USD ($)	USD ($)	USD ($)	CNY	USD ($)	USD ($)	CNY
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'
Total Short-Term Borrowings	$40,000,000	$40,000,000	$33,000,000	$28,000,000	'	'	'	'	'
Borrowing capacity under Credit Facility	'	'	'	'	30,000,000	189,000,000	'	20,000,000	125,000,000
Period of Term Loan Facility	'	'	'	'	'1 year	'1 year	'1 year	'	'
Credit facility borrowings	$33,000,000	$28,000,000	'	'	$14,000,000	'	$19,000,000	'	'
Line of credit rate basis	'	'	'	'	100.00%	100.00%	100.00%	'	'
Borrowings, interest rate basis	'	'	'	'	5.60%	5.60%	5.60%	'	'
Interest rate of Chinese Credit Facility BOA	'	'	'	'	'Chinese Credit FacilitybBOA currently bears interest at a rate based on 100% of the Peoplebs Bank of Chinabs base rate, which was 5.6% as of June 30, 2014	'Chinese Credit FacilitybBOA currently bears interest at a rate based on 100% of the Peoplebs Bank of Chinabs base rate, which was 5.6% as of June 30, 2014	'Chinese Credit FacilitybJPM currently bears interest at a rate based on 100% of the Peoplebs Bank of Chinabs base rate, which was 5.6% as of June 30, 2014.	'	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Effective tax rate	30.60%	25.60%	29.20%	25.90%
Accrued interest	$1,000,000	'	$1,000,000	'
Accrued penalties	$0	'	$0	'

Other_LongTerm_Liabilities_Sch

Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]	'		'
Unrecognized tax benefits	$58	[1]	$38	[1]
Construction liabilities	36	[2]	8	[2]
Other	17	[3]	6	[3]
Total other long-term liabilities	$111		$52
[1]	Amount includes accrued interest related to this liability
[2]	We capitalize construction in progress and record a corresponding long-term liability for build-to-suit lease agreements where we are considered the owner during the construction period for accounting purposes only.
[3]	Amounts primarily consist of long term deferred rent balances related to operating leases for office space.

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Details) (Maximum)	6 Months Ended
	Jun. 30, 2014
Maximum	'
Commitment And Contingencies [Line Items]	'
Criteria percentage of damages claims	10.00%

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Details) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Feb. 15, 2013
Class Of Stock [Line Items]	'	'	'
Preferred stock, shares authorized	100,000,000	100,000,000	'
Preferred stock, par value	$0.00	0.001	'
Preferred stock, shares issued	0	0	'
Common stock, shares authorized	1,600,000,000	1,600,000,000	'
Common stock, par value	$0.00	0.001	'
Vote per common share	1	'	'
Right to voting	'one vote per share	'	'
Percentage of directors elected by common stock holders	25.00%	'	'
Number of directors	3	'	'
Conversion of Class B common stock	1	'	'
Common stock, shares issued	132,091,353	131,537,798	'
Common stock, shares outstanding	129,970,644	129,417,089	'
Dividend declared on common stock	$0	'	'
Treasury Stock	'	'	'
Class Of Stock [Line Items]	'	'	'
Common stock, shares issued	2,120,709	2,120,709	'
Authorized the repurchase of shares of common stock	'	'	250,000,000
Common stock outstanding shares repurchased	2,120,709	'	'
Remaining authorized share repurchased amount	$105	'	'
Class B Common Stock	'	'	'
Class Of Stock [Line Items]	'	'	'
Common stock, shares authorized	400,000,000	400,000,000	'
Common stock, par value	$0.00	0.001	'
Vote per common share	10	'	'
Right to voting	'10 votes per share	'	'
Common stock, shares issued	12,799,999	12,799,999	'
Common stock, shares outstanding	12,799,999	12,799,999	'

Segment_Information_Additional

Segment Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2014
	Segment
Segment Reporting [Abstract]	'
Number of reportable segment	1
Number of Operating Segments	1

Segment_Information_Reconcilia

Segment Information - Reconciliation of Adjusted EBITDA to Net Income (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting [Abstract]	'	'	'	'
Adjusted EBITDA	$129	$113	$251	$222
Depreciation	-11	-7	-21	-13
OIBA	118	106	230	209
Amortization of intangible assets	-3	-2	-5	-3
Stock-based compensation	-15	-10	-29	-24
Other expense, net	-2	-4	-4	-8
Provision for income taxes	-30	-23	-56	-45
Net income	$68	$67	$136	$129

Earnings_Per_Share_Reconciliat

Earnings Per Share - Reconciliation of Weighted Average Number of Shares of Common Stock Outstanding (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net income	$68	$67	$136	$129
Denominator:	'	'	'	'
Weighted average shares used to compute Basic EPS	142,701	143,531	142,550	143,297
Weighted average effect of dilutive securities:	'	'	'	'
Stock options	2,777	1,940	2,831	1,671
RSUs	304	193	343	192
Weighted average shares used to compute Diluted EPS	145,782	145,664	145,724	145,160
Basic EPS	$0.48	$0.47	$0.95	$0.90
Diluted EPS	$0.47	$0.46	$0.93	$0.89

Earnings_Per_Share_Common_Shar

Earnings Per Share - Common Shares Related to Stock Options and RSUs Excluded from Calculated Diluted Net Income Per Share (Details)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Potential common shares excluded from the calculation of Diluted EPS	1,744	1,789	1,935	3,183
Stock Options	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Potential common shares excluded from the calculation of Diluted EPS	1,689	1,741	1,688	3,159
Restricted Stock Units (RSUs)	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Potential common shares excluded from the calculation of Diluted EPS	55	48	247	24

Earnings_Per_Share_Common_Shar1

Earnings Per Share - Common Shares Related to Stock Options and RSUs Excluded from Calculated Diluted Net Income Per Share (Parenthetical) (Details)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Performance based options, bearing right to acquire common stock	66,666	210,000
Total performance based options and restricted stock units, bearing right to acquire common stock	110,666	254,000
Restricted Stock Units (RSUs)	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'
Restricted stock units, bearing right to acquire common stock	44,000	44,000

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Details)	6 Months Ended
	Jun. 30, 2014
Related Party Transaction [Line Items]	'
Right to voting	'one vote per share
Class B Common Stock	'
Related Party Transaction [Line Items]	'
Right to voting	'10 votes per share
Liberty	'
Related Party Transaction [Line Items]	'
Beneficially ownership of shares of common stock	18,159,752
Percentage taken from outstanding shares of Common Stock	14.00%
Percentage of beneficially ownership of shares of common stock	21.70%
Right to voting	'one vote per share
Beneficially ownership of equity securities	56.70%
Liberty | Class B Common Stock	'
Related Party Transaction [Line Items]	'
Beneficially ownership of shares of common stock	12,799,999
Percentage taken from outstanding shares of Common Stock	100.00%
Right to voting	'ten votes per share

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Details) (Viator Incorporated, Subsequent Event, USD $)	1 Months Ended
In Millions, unless otherwise specified	Jul. 24, 2014
	Event
	Item
Viator Incorporated | Subsequent Event	'
Subsequent Event [Line Items]	'
Date of acquisition agreement	24-Jul-14
Total purchase price consideration	$200
Number of bookable tours and attractions featured	20,000
Number of reviews, photos, and videos featured	600,000