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If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"CNY":[{"end":"2010-12-31","val":246000000,"accn":"0001193125-12-245998","fy":2011,"fp":"FY","form":"20-F/A","filed":"2012-05-24","frame":"CY2010Q4I"}]}},"TemporaryEquityParOrStatedValuePerShare":{"label":"Temporary Equity, Par or Stated Value Per Share","description":"Per share amount of par value or stated value of stock classified as temporary equity. 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Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. 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If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. 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Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2010-12-31","val":130000000,"accn":"0001193125-12-245998","fy":2011,"fp":"FY","form":"20-F/A","filed":"2012-05-24","frame":"CY2010Q4I"}]}},"TemporaryEquitySharesOutstanding":{"label":"Temporary Equity, Shares Outstanding","description":"The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2010-12-31","val":130000000,"accn":"0001193125-12-245998","fy":2011,"fp":"FY","form":"20-F/A","filed":"2012-05-24","frame":"CY2010Q4I"}]}},"TreasuryStockRetiredCostMethodAmount":{"label":"Treasury Stock, Retired, Cost Method, Amount","description":"Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method.","units":{"CNY":[{"start":"2012-01-01","end":"2012-12-31","val":716000,"accn":"0001104659-13-033268","fy":2012,"fp":"FY","form":"20-F","filed":"2013-04-26"},{"start":"2012-01-01","end":"2012-12-31","val":716000,"accn":"0001104659-14-030274","fy":2013,"fp":"FY","form":"20-F","filed":"2014-04-25"},{"start":"2012-01-01","end":"2012-12-31","val":716000,"accn":"0001104659-15-032006","fy":2014,"fp":"FY","form":"20-F","filed":"2015-04-30","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":780000,"accn":"0001104659-14-030274","fy":2013,"fp":"FY","form":"20-F","filed":"2014-04-25"},{"start":"2013-01-01","end":"2013-12-31","val":780000,"accn":"0001104659-15-032006","fy":2014,"fp":"FY","form":"20-F","filed":"2015-04-30"},{"start":"2013-01-01","end":"2013-12-31","val":780000,"accn":"0001104659-16-114871","fy":2015,"fp":"FY","form":"20-F","filed":"2016-04-28","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":1156000,"accn":"0001104659-15-032006","fy":2014,"fp":"FY","form":"20-F","filed":"2015-04-30"},{"start":"2014-01-01","end":"2014-12-31","val":1156000,"accn":"0001104659-16-114871","fy":2015,"fp":"FY","form":"20-F","filed":"2016-04-28"},{"start":"2014-01-01","end":"2014-12-31","val":1156000,"accn":"0001104659-17-027241","fy":2016,"fp":"FY","form":"20-F","filed":"2017-04-28","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":507000,"accn":"0001104659-16-114871","fy":2015,"fp":"FY","form":"20-F","filed":"2016-04-28"},{"start":"2015-01-01","end":"2015-12-31","val":507000,"accn":"0001104659-17-027241","fy":2016,"fp":"FY","form":"20-F","filed":"2017-04-28"},{"start":"2015-01-01","end":"2015-12-31","val":507000,"accn":"0001104659-18-026859","fy":2017,"fp":"FY","form":"20-F","filed":"2018-04-26","frame":"CY2015"}]}},"TreasuryStockShares":{"label":"Treasury Stock, Shares","description":"Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. 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Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.","units":{"CNY":[{"end":"2011-12-31","val":0,"accn":"0001104659-13-033268","fy":2012,"fp":"FY","form":"20-F","filed":"2013-04-26","frame":"CY2011Q4I"},{"end":"2012-12-31","val":112000,"accn":"0001104659-13-033268","fy":2012,"fp":"FY","form":"20-F","filed":"2013-04-26"},{"end":"2012-12-31","val":112000,"accn":"0001104659-14-030274","fy":2013,"fp":"FY","form":"20-F","filed":"2014-04-25","frame":"CY2012Q4I"},{"end":"2013-12-31","val":0,"accn":"0001104659-14-030274","fy":2013,"fp":"FY","form":"20-F","filed":"2014-04-25"},{"end":"2013-12-31","val":0,"accn":"0001104659-15-032006","fy":2014,"fp":"FY","form":"20-F","filed":"2015-04-30","frame":"CY2013Q4I"},{"end":"2014-12-31","val":13379000,"accn":"0001104659-15-032006","fy":2014,"fp":"FY","form":"20-F","filed":"2015-04-30"},{"end":"2014-12-31","val":13379000,"accn":"0001104659-16-114871","fy":2015,"fp":"FY","form":"20-F","filed":"2016-04-28","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001104659-16-114871","fy":2015,"fp":"FY","form":"20-F","filed":"2016-04-28","frame":"CY2015Q4I"}],"USD":[{"end":"2012-12-31","val":18000,"accn":"0001104659-13-033268","fy":2012,"fp":"FY","form":"20-F","filed":"2013-04-26","frame":"CY2012Q4I"},{"end":"2013-12-31","val":0,"accn":"0001104659-14-030274","fy":2013,"fp":"FY","form":"20-F","filed":"2014-04-25","frame":"CY2013Q4I"},{"end":"2014-12-31","val":2156000,"accn":"0001104659-15-032006","fy":2014,"fp":"FY","form":"20-F","filed":"2015-04-30","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001104659-16-114871","fy":2015,"fp":"FY","form":"20-F","filed":"2016-04-28","frame":"CY2015Q4I"}]}},"TreasuryStockValueAcquiredCostMethod":{"label":"Treasury Stock, Value, Acquired, Cost Method","description":"Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost 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