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Weighted Average Useful Lives from Date of Purchase of Intangible Assets (Detail) | 12 Months Ended
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Dec. 31, 2017
Land use right |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 50 years
Customer relationships |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 3 years
Software |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 4 years
Trademarks |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 10 years
User list |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 3 years
Licensed copyrights of video contents |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 3 years
Others |
Finite-Lived Intangible Assets [Line Items] |
Finite-lived intangible asset weighted average economic life | 6 years

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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