Acquisition of land use rights

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- Definition

Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents

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- Definition

Reclassification between Performance (formerly online) and Brand (formerly offline) Advertising

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No definition available.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Glossary Current Liabilities
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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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No definition available.

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- Definition

Value of deferred revenue or cost to provide products or services, which is expected to be recognized in income or incurred within one year or the normal operating cycle, if longer, resulting from customer loyalty program. Excludes liability associated with frequent flier programs. Includes liability associated with customer loyalty programs for other businesses, for example, but is not limited to, hotels, supermarkets, credit card companies, automobile rental companies, and book sellers.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) $ in Thousands, € in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2016 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Nov. 25, 2015 EUR (€)	Mar. 03, 2015 EUR (€)	Sep. 23, 2014 EUR (€)
Cash and cash equivalents							$ 2,081,075		$ 1,477,265
Acquisition of land use rights		$ 48,494	$ 0	$ 0
Customer loyalty program liability, current							84,400		71,100
Accrued online advertising liabilities							267,500		188,200
Reclassification between Performance (formerly online) and Brand (formerly offline) Advertising			59,000	25,800
Accrued compensation liabilities							242,600		186,100
2.15% Senior Notes due November 2022
Senior notes face amount \| €						€ 750		€ 750		€ 750
1.8% Senior Notes due March 2027
Senior notes face amount \| €						1,000		1,000			€ 1,000
2.375% Senior Notes Due September 2024
Senior notes face amount \| €						€ 1,000		€ 1,000				€ 1,000
ASU 2016-18
Cash and cash equivalents				3,148,651			2,081,075		1,477,265
Restricted cash				843			932		806
Cash, cash equivalents and restricted cash, end of period				3,149,494			$ 2,082,007		$ 1,478,071
Scenario, forecast \| ASU 2016-09 \| Retained earnings
Cumulative effect of new accounting principle					$ 300,000
Scenario, forecast \| ASU 2016-09 \| ASU 2016-09, forfeiture rate component
Cumulative effect of new accounting principle					7,000
Scenario, forecast \| ASU 2016-09 \| Additional paid-in capital
Cumulative effect of new accounting principle					9,000
Scenario, forecast \| ASU 2016-09 \| Deferred tax assets
Cumulative effect of new accounting principle					$ 2,000
Software development
Additions to capitalized website development		54,200	$ 44,200	$ 20,900
Headquarters \| Booking.com
Acquisition of land use rights	€ 43	$ 45,300