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EARNINGS PER SHARE (Details)
 12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Dec. 31, 2013
Stock options
Dec. 31, 2012
Stock options
Dec. 31, 2011
Stock options
Dec. 31, 2013
Sold Warrants
Dec. 31, 2012
Sold Warrants
Dec. 31, 2013
Ordinary shares
USD ($)
Dec. 31, 2013
Ordinary shares
CNY
Dec. 31, 2012
Ordinary shares
CNY
Dec. 31, 2011
Ordinary shares
CNY
Dec. 31, 2013
ADS
USD ($)
Dec. 31, 2013
ADS
CNY
Dec. 31, 2012
ADS
CNY
Dec. 31, 2011
ADS
CNY
Numerator:                                  
Net income attributable to Ctrip's shareholders $ 164,910,665 998,319,684 714,405,864 1,076,414,897                          
Eliminate the dilutive effect of interest expense of convertible bond   15,496,021 4,617,398                            
Numerator for diluted earnings per share   1,013,815,705 719,023,262 1,076,414,897                          
Denominator:                                  
Denominator for basic earnings per ordinary share - weighted average ordinary shares outstanding 32,905,601 32,905,601 34,236,761 35,977,063                          
Dilutive effect of share options 2,359,614 2,359,614 1,230,941 2,053,911                          
Dilutive effect of convertible bond 2,206,157 2,206,157 623,083                            
Dilutive effect of convertible bond sold warrants 598,469 598,469                              
Denominator for diluted earnings per ordinary share 38,069,841 38,069,841 36,090,785 38,030,974                          
Earning per share                                  
Basic (in dollars per share)                   $ 5.01 30.34 20.87 29.92 $ 1.52 7.58 5.22 7.48
Diluted (in dollars per share)                   $ 4.40 26.63 19.92 28.30 $ 1.10 6.66 4.98 7.08
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share 1,121,691 1,121,691 2,078,826 715,894 251,266 1,779,507 715,894 870,425 299,319