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PRINCIPAL ACCOUNTING POLICIES (Details 9) | 1 Months Ended
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Jan. 31, 2012 shares
PRINCIPAL ACCOUNTING POLICIES |
Number of shares, converted to RSU in January 2012 | (1,901,372)

X
- Definition Represents the number of share options (or share units) converted during the current period. + References No definition available. + Details
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Namespace Prefix: | ctrp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration