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Summary of Redeemable Noncontrolling Interest (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥)
Temporary Equity Disclosure [Abstract] |  |  |  |
Balance as of January 1 | $ 568,613 | ¥ 3,947,879 | ¥ 1,894,502 | ¥ 0
Other comprehensive income | 46,869 | 325,408 | 142,071 | 0
Issuance of subsidiary shares | 95,170 | 660,771 | 1,582,126 | 1,841,819
Accretion of redeemable noncontrolling interests | 80,357 | 557,918 | 329,180 | 52,683
Balance as of December 31 | $ 791,009 | ¥ 5,491,976 | ¥ 3,947,879 | ¥ 1,894,502

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- Definition As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 + Details
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- Definition Value of accretion of temporary equity to its redemption value during the period. + References No definition available. + Details
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- Definition Adjustments to temporary equity resulting from foreign currency translation adjustments. + References No definition available. + Details
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