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Business Combination - Additional Information (Detail) | 1 Months Ended | 12 Months Ended |  | 1 Months Ended |
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Oct. 01, 2013 91 Wireless USD ($) | Dec. 31, 2013 91 Wireless USD ($) | Dec. 31, 2013 91 Wireless CNY | Oct. 01, 2013 91 Wireless CNY | Oct. 01, 2013 91 Wireless Trademarks USD ($) | Oct. 01, 2013 91 Wireless Trademarks CNY | Oct. 01, 2013 91 Wireless Customer relationships USD ($) | Oct. 01, 2013 91 Wireless Customer relationships CNY | Oct. 01, 2013 91 Wireless Software USD ($) | Oct. 01, 2013 91 Wireless Software CNY | Oct. 01, 2013 91 Wireless Developer Relationship USD ($) | Oct. 01, 2013 91 Wireless Developer Relationship CNY | Oct. 01, 2013 91 Wireless User List USD ($) | Oct. 01, 2013 91 Wireless User List CNY | Jul. 20, 2011 Qunar USD ($) | Jul. 20, 2011 Qunar CNY
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, percentage of voting interests acquired | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, cash paid upon acquisition | $ 1,830,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, amount deposited in an escrow account | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, escrow period | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
The fair value of acquired intangible assets | 189,355,000 |  |  | 1,146,300,000 | 47,740,000 | 289,000,000 | 49,890,000 | 302,000,000 | 18,850,000 | 114,100,000 | 13,450,000 | 81,400,000 | 59,430,000 | 359,800,000 |  | 711,570,000
Intangible assets, useful life |  |  |  |  | 10 years | 10 years | 3 years 3 months 18 days | 3 years 3 months 18 days | 5 years 3 months 18 days | 5 years 3 months 18 days | 2 years 3 months 18 days | 2 years 3 months 18 days | 3 years 3 months 18 days | 3 years 3 months 18 days |  |
Business combination, acquisition related costs |  | 2,760,000 | 16,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, amount of revenue of the acquiree included in the Company's consolidated statements of comprehensive income from the acquisition date |  | 42,920,000 | 259,840,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, amount of net income of the acquiree included in the Company's consolidated statements of comprehensive income from the acquisition date |  | 4,600,000 | 27,840,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination, percentage of equity interests acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62.01%
Business combination, purchase consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,280,000 |

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- Definition The period in which the escrowed amount reserved will be released to pay for liabilities resulting from any breach of the representations and warranties made upon the acquisition or indemnifiable loss incurred, if any, and the period after which any remaining amount will be released and transferred to acquiree's original selling shareholders. + References No definition available. + Details
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- Definition Percentage of equity interests acquired at the acquisition date in the business combination. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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