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Commitment and Contingencies - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2013 CNY (¥) | Dec. 31, 2015 CNY (¥)
Network Infrastructure and Buildings |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |
Capital commitments contracted not yet reflected in financial statements | $ 91,070,000 |  |  |  | ¥ 589,930,000
Office |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |
Total operating lease expense | 99,890,000 | ¥ 647,090,000 | ¥ 525,310,000 | ¥ 284,580,000 |
IDC Facilities |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |
Total operating lease expense | 574,270,000 | ¥ 3,720,000,000 | 2,850,000,000 | ¥ 1,940,000,000 |
Obligations related to the entity's directors and officers |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |
Fair value of indemnification obligations related to the entity's directors and officers | $ 0 |  | ¥ 0 |  | ¥ 0

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