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LONG-TERM DEPOSITS AND PREPAYMENTS (Details) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
--- | --- | --- | ---
LONG-TERM DEPOSITS AND PREPAYMENTS |  |  |
Deposits paid to airline suppliers |  | ¥ 276,128,171 | ¥ 244,072,331
Prepayments for purchase of long lived assets |  | 241,378,538 | 625,084,070
Deposits paid to hotel suppliers |  | 74,723,795 | 126,728,198
Others |  | 247,689,752 | 151,394,598
Total | $ 129,093,380 | ¥ 839,920,256 | ¥ 1,147,279,197

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- Definition Deposit Paid to Airline Suppliers + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Deposit paid to hotel suppliers. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Other Deposit Assets + References No definition available. + Details
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Namespace Prefix: | ctrp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The total of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year and amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer. + References No definition available. + Details
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Namespace Prefix: | ctrp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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