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Principal accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Principal accounting policies [Abstract] |
Schedule of property and equipment estimated useful lives and residual rate |
|  | Estimated useful lives |  |  | Residual rate
Buildings |  | 40 years |  |  | 0%
Decoration of buildings |  | 10 years |  |  | 0 %
Servers, computers and equipment |  | 3 years |  |  | 0%-5%
Furniture, fixture and office equipment |  | 5 years |  |  | 0%-5%
Motor vehicles |  | 4 years |  |  | 5%
Leasehold improvements |  | Shorter of lease term or 5 years |  |  | -
Schedule of amortization of finite-lived intangible assets is computed using the straight-line method over the following estimated useful lives |
|  | Estimated useful lives
Brand names |  | 1-15 years
Operating rights for licensed games |  | Shorter of the economic life or license period of relevant online game
Software |  | 3 -5 years
Operating rights for game broadcasting |  | Over the contract terms
Domain names |  | 15 years
Technology |  | 5 years
Others |  | 3-5 years

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- Definition Tabular disclosure of the estimated useful life and residual rate of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References No definition available. + Details
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- Definition Tabular disclosure of useful life of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References No definition available. + Details
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