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Percentage of ownership interest in new subsidiary purchased from parent by key members of an existing wholly-owned subsidiary management team which, combined with the shares held by the management team of the newly acquired subsidiary, represent the redeemable shares. The holders of the redeemable shares have the right to put their shares to the parent company and the parent company has the right to call the shares in each case at a purchase price reflecting the fair value of the redeemable shares at the time of exercise.

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This element represents the effect due to a change in redeemable noncontrolling interest during the period as a result of change in the fair value of redeemable noncontrolling interest.

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Amount of income (loss) from continuing operations attributable to the noncontrolling interest. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Amount after tax and reclassification adjustments, resulting from the process of expressing in the reporting currency of the reporting entity those amounts that are denominated or measured in a different currency, and from transactions whose terms are denominated in a currency other than the entity's functional currency, which is attributable to noncontrolling interests.

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The cash outflow during the period for redemption of redeemable noncontrolling interests.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The fair value as of the reporting date of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form.

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REDEEMABLE NONCONTROLLING INTERESTS (Details) (USD $)	6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended		1 Months Ended	3 Months Ended				1 Months Ended
REDEEMABLE NONCONTROLLING INTERESTS (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	May 18, 2010 Priceline.com International Limited (PIL)	Jun. 30, 2013 Priceline.com International Limited (PIL)	Jun. 30, 2012 Priceline.com International Limited (PIL)	Jun. 30, 2013 Priceline.com International Limited (PIL)	Jun. 30, 2012 Priceline.com International Limited (PIL)	Jun. 30, 2010 Travel Jigsaw Holdings Limited [Member]	Jun. 30, 2012 Travel Jigsaw Holdings Limited [Member]	Jun. 30, 2011 Travel Jigsaw Holdings Limited [Member]	Apr. 30, 2012 Travel Jigsaw Holdings Limited [Member]	Mar. 31, 2011 Travel Jigsaw Holdings Limited [Member]	Apr. 30, 2013 Subsequent Event [Member] Travel Jigsaw Holdings Limited [Member]
Acquisition of Controlling and Redeemable Controlling Interest
Payments to purchase a controlling interest of the outstanding equity of TravelJigsaw Holdings Limited and its operating subsidiary			$ 108,500,000
Percent purchased, by certain key members of the management team of Booking.com, of ownership interest in TravelJigsaw from PIL (as a percent)								3.00%
Noncontrolling interests, aggregate purchase price of remaining outstanding shares	192,530,000	61,079,000							61,100,000	13,000,000			192,500,000
Parent ownership percentage											12.70%	19.00%
Reconciliation of redeemable noncontrolling interests
Balance, beginning of period	160,287,000			190,893,000	183,316,000	160,287,000	127,045,000
Net income attributable to noncontrolling interests				114,000	307,000	135,000	153,000
Fair value adjustments (1)	(42,522,000)			(246,000)	(8,774,000)	42,522,000	43,440,000
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests				(192,530,000)	(61,079,000)	(192,530,000)	(61,079,000)
Currency translation adjustments				1,769,000	(3,586,000)	(10,414,000)	625,000
Balance, end of period	$ 0			$ 0	$ 110,184,000	$ 0	$ 110,184,000