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TAXATION - Company's subsidiaries (Details) - CNY (¥) | 12 Months Ended | 36 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2017
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 25.00% | 25.00% | 25.00% |  |  |  |
Deferred tax liability provided on the outside basis difference from undistributed earnings | ¥ 0 |  |  |  |  |  | ¥ 0
Ctrip Computer Technology |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 15.00%
Ctrip Travel Network |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 15.00%
Ctrip Travel Information |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  |  |  | 15.00%
Hong Kong Profits Tax |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 16.50% |  |  |  |  |  |
Taiwan Enterprise Income Tax |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 17.00% |  |  |  |  |  |
PRC Corporate Income Tax |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 25.00% |  |  |  |  |  |
PRC Corporate Income Tax | Western region of China | Chengdu Ctrip |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate approved (as a percent) | 15.00% | 15.00% | 15.00% | 15.00% | 15.00% | 15.00% |
PRC Corporate Income Tax | Western region of China | Chengdu Ctrip International |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate approved (as a percent) | 15.00% | 15.00% | 15.00% | 15.00% | 15.00% | 15.00% |
PRC Corporate Income Tax | Western region of China | Chengdu Information |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate approved (as a percent) | 15.00% | 15.00% | 15.00% | 15.00% | 15.00% | 15.00% |
PRC Corporate Income Tax | High new tech enterprises | Ctrip Computer Technology |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% |  |  |  |  |  |
PRC Corporate Income Tax | High new tech enterprises | Ctrip Travel Network |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% |  |  |  |  |  |
PRC Corporate Income Tax | High new tech enterprises | Qunar Software |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% | 15.00% | 15.00% |  |  |  |
PRC Corporate Income Tax | High new tech enterprises | Qunar Beijing |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% | 15.00% | 15.00% |  |  |  |
PRC Corporate Income Tax | High new tech enterprises | Ctrip Travel Information |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% |  |  |  |  |  |

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