Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Retrospective Effects of Applying Equity Method of Accounting to Consolidated Statements of Balance Sheets and Consolidated Statements of Comprehensive Income (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2013 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2012 CNY (¥)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Short-term investments	$ 8,948,909		¥ 42,698,831		¥ 57,969,242
Long-term investments, net	5,859,797		3,544,923		37,958,591
Additional paid-in capital	988,352		3,650,601		6,402,349
Retained earnings	11,525,418		47,701,326		74,659,355
Accumulated other comprehensive income (loss)	(124,434)		(279,518)	¥ 181,258	¥ (806,056)	¥ (78,278)
Income (loss) from equity method investments	597	¥ 3,867	(19,943)	22,578
Other, net	3,817,370	24,728,162	260,558	189,330
Net income	$ 5,006,676	¥ 32,432,246	12,253,234	10,387,777
As Originally Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Short-term investments			43,818,037
Long-term investments, net			2,878,922
Additional paid-in capital			3,633,919
Retained earnings			47,659,772
Accumulated other comprehensive income (loss)			231,923
Income (loss) from equity method investments			(26,952)	(5,806)
Other, net			257,704	186,023
Net income			¥ 12,243,371	¥ 10,356,086