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Summary of Redeemable Noncontrolling Interest (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2013 CNY (¥)
Temporary Equity Disclosure [Abstract]
Balance as of January 1	$ 292,461	¥ 1,894,502		¥ 1,033,283
Net losses				(61,857)
Other comprehensive income (loss)	21,932	142,071		(55,420)
Exercise of share-based awards				464
Share-based compensation				11,259
Issuance of subsidiary shares	244,237	1,582,126	¥ 1,841,819	51,368
Accretion of redeemable noncontrolling interests	50,817	329,180	52,683	31,799
Acquisition of subsidiaries' redeemable shares from shareholders				(121,962)
Reclassification of redeemable noncontrolling interests				¥ (888,934)
Balance as of December 31	$ 609,447	¥ 3,947,879	¥ 1,894,502

X

- Definition

Amount of decrease in Redeemable Noncontrolling Interests from redeeming or purchasing the interests of redeemable noncontrolling shareholders.

+ References

No definition available.

+ Details

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- Definition

Change of temporary equity due to equity issuance of subsidiaries.

+ References

No definition available.

+ Details

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X

- Definition

Change of temporary equity during the period due to the reclassification of temporary equity to permanent equity since the redemption rights of the equity instruments are terminated.

+ References

No definition available.

+ Details

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X

- Definition

Change of temporary equity during the period due to the recognized amount of share-based compensation.

+ References

No definition available.

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X

- 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=27011957&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=27011957&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=27011957&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=27011957&loc=SL6540498-122764

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X

- Definition

Value of accretion of temporary equity to its redemption value during the period.

+ References

No definition available.

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- References

No definition available.

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Balance Type:	na
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X

- Definition

Adjustments to temporary equity resulting from foreign currency translation adjustments.

+ References

No definition available.

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X

- Definition

The portion of net income or loss attributable to temporary equity interest.

+ References

No definition available.

+ Details

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X

- Definition

This element may be used to disclose other activity associated with temporary equity that is not separately disclosed.

+ References

No definition available.

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