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PRINCIPAL ACCOUNTING POLICIES (Details 14) ¥ in Millions, $ in Millions		1 Months Ended	9 Months Ended
	Jun. 30, 2015	Jul. 31, 2015 director	Sep. 30, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY (¥)	Jun. 13, 2012 USD ($)
Tujia
Gain on deconsolidation of subsidiaries
Percentage of interest before sale of redeemable convertible preferred shares	50.00%	50.00%
Percentage of interest after sale of redeemable convertible preferred shares		45.00%
Number Of Seats Allocated | director		6
Number Of Board Of Directors Seats | director		12
China
Dividends
Restricted net assets of company's PRC subsidiaries and VIEs not distributable in form of dividends to parent | ¥			¥ 1,800
Accumulated profit of subsidiaries in PRC distributable in form of dividends to parent | ¥			¥ 5,900	¥ 5,000
Withholding tax rate for dividends distributed by foreign invested enterprise to their immediate holding companies outside mainland china (as a percent)			10.00%
Amount approved as payment of dividend to purchase ADSs | $							$ 300.0
PRC withholding tax					$ 15.0	¥ 95
HK
Dividends
Withholding tax rate for dividends distributed by foreign invested enterprise to their immediate holding companies outside mainland china (as a percent)			5.00%

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Amount of restricted net assets that may be distributed to the parent.

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Amount of dividend distribution approved for funding of purchase of American depositary shares.

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Amount of restricted net assets that may not be distributed to the parent.

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The amount of withholding accrued for dividends distributed by a foreign invested enterprise to a subsidiary in Hong Kong. This amount represents the maximum which could be due for the dividend approved.

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Withholding Tax Rate for Dividends Distributed by Foreign Invested Enterprise to Their Immediate Holding Companies Outside Mainland China

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Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

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Percentage of subsidiary's or equity investee's stock owned by parent company before stock transaction.

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