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Summary of Estimated Fair Values of Assets Acquired, Liabilities Assumed and Noncontrolling Interest (Detail) In Thousands, unless otherwise specified | Dec. 31, 2013 USD ($) | Dec. 31, 2013 CNY | Dec. 31, 2012 USD ($) | Dec. 31, 2012 CNY | Dec. 31, 2011 CNY | Dec. 31, 2010 CNY | Dec. 31, 2012 Business Acquisitions 2012 CNY | Jul. 20, 2011 Qunar CNY | Dec. 31, 2013 Series of Individually Immaterial Business Acquisitions USD ($) | Dec. 31, 2013 Series of Individually Immaterial Business Acquisitions CNY | Oct. 01, 2013 91 Wireless USD ($) | Oct. 01, 2013 91 Wireless CNY
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Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business combination, purchase consideration |  |  |  |  |  |  | 1,190,717 | 1,939,569 | $ 638,514 | 3,865,378 | $ 1,849,486 | 11,196,235
Net assets acquired, excluding intangible assets and the related deferred tax liabilities |  |  |  |  |  |  | 91,095 | 115,515 | 77,169 | 467,159 | 79,842 | 483,341
Intangible assets, net |  |  |  |  |  |  | 664,380 | 711,570 | 131,558 | 796,415 | 189,355 | 1,146,300
Deferred tax liabilities, noncurrent |  |  |  |  |  |  | (72,222) | (136,856) | (18,540) | (112,233) | (45,979) | (278,346)
Noncontrolling interests |  |  |  |  |  |  | (32,507) | (102,922) | (70,670) | (427,813) |  |
Redeemable noncontrolling interests |  |  |  |  |  |  | (100,101) | (942,004) |  |  |  |
Pre-existing equity method investments |  |  |  |  |  |  | (817,951) |  |  |  |  |
Goodwill | $ 2,785,792 | 16,864,350 | $ 640,528 | 3,877,564 | 2,419,542 | 63,686 | 1,458,023 | 2,294,266 | $ 518,997 | 3,141,850 | $ 1,626,268 | 9,844,940

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- Definition The amount of acquisition cost of a business combination allocated to assets acquired (excluding identifiable intangible assets and the related deferred tax liabilities) less liabilities assumed. + References No definition available. + Details
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- Definition This element represents the fair value of redeemable noncontrolling interest in the acquiree at the acquisition date. + References No definition available. + 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 No definition available. + Details
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- Definition Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages. + References No definition available. + Details
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- Definition This element represents the fair value of the noncontrolling interest in the acquiree at 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at 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 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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