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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.","units":{"USD":[{"end":"2010-12-31","val":726900000,"accn":"0001193125-12-078446","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2010-12-31","val":726900000,"accn":"0001193125-12-170541","fy":2011,"fp":"FY","form":"8-K","filed":"2012-04-19","frame":"CY2010Q4I"},{"end":"2011-12-31","val":715400000,"accn":"0001193125-12-078446","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":715400000,"accn":"0001193125-12-170541","fy":2011,"fp":"FY","form":"8-K","filed":"2012-04-19"},{"end":"2011-12-31","val":715400000,"accn":"0001193125-12-176308","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-24"},{"end":"2011-12-31","val":715400000,"accn":"0001193125-12-337576","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-06"},{"end":"2011-12-31","val":715400000,"accn":"0001193125-13-073864","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-25"},{"end":"2011-12-31","val":715400000,"accn":"0001193125-13-160937","fy":2012,"fp":"FY","form":"8-K","filed":"2013-04-18","frame":"CY2011Q4I"},{"end":"2012-03-31","val":733800000,"accn":"0001193125-12-176308","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-24","frame":"CY2012Q1I"},{"end":"2012-06-30","val":900400000,"accn":"0001193125-12-337576","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-06","frame":"CY2012Q2I"},{"end":"2012-12-31","val":787900000,"accn":"0001193125-13-073864","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-25"},{"end":"2012-12-31","val":787900000,"accn":"0001193125-13-160937","fy":2012,"fp":"FY","form":"8-K","filed":"2013-04-18"},{"end":"2012-12-31","val":787900000,"accn":"0000912513-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-21","frame":"CY2012Q4I"},{"end":"2013-12-31","val":731200000,"accn":"0000912513-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-21"},{"end":"2013-12-31","val":731200000,"accn":"0000912513-15-000002","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2013Q4I"},{"end":"2014-12-31","val":761500000,"accn":"0000912513-15-000002","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2014Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive":{"label":"Long-Term Debt, Maturity, after Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2011-12-31","val":250700000,"accn":"0001193125-12-078446","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":250700000,"accn":"0001193125-12-170541","fy":2011,"fp":"FY","form":"8-K","filed":"2012-04-19","frame":"CY2011Q4I"},{"end":"2012-12-31","val":6000000,"accn":"0001193125-13-073864","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-25"},{"end":"2012-12-31","val":6000000,"accn":"0001193125-13-160937","fy":2012,"fp":"FY","form":"8-K","filed":"2013-04-18","frame":"CY2012Q4I"},{"end":"2013-12-31","val":417900000,"accn":"0000912513-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-21","frame":"CY2013Q4I"},{"end":"2014-12-31","val":667300000,"accn":"0000912513-15-000002","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2014Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths":{"label":"Long-Term Debt, Maturity, Year One","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2011-12-31","val":0,"accn":"0001193125-12-078446","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":0,"accn":"0001193125-12-170541","fy":2011,"fp":"FY","form":"8-K","filed":"2012-04-19","frame":"CY2011Q4I"},{"end":"2012-12-31","val":136100000,"accn":"0001193125-13-073864","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-25"},{"end":"2012-12-31","val":136100000,"accn":"0001193125-13-160937","fy":2012,"fp":"FY","form":"8-K","filed":"2013-04-18","frame":"CY2012Q4I"},{"end":"2013-12-31","val":100000,"accn":"0000912513-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-21","frame":"CY2013Q4I"},{"end":"2014-12-31","val":100000,"accn":"0000912513-15-000002","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2014Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive":{"label":"Long-Term Debt, Maturity, Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2011-12-31","val":0,"accn":"0001193125-12-078446","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":0,"accn":"0001193125-12-170541","fy":2011,"fp":"FY","form":"8-K","filed":"2012-04-19","frame":"CY2011Q4I"},{"end":"2012-12-31","val":249000000,"accn":"0001193125-13-073864","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-25"},{"end":"2012-12-31","val":249000000,"accn":"0001193125-13-160937","fy":2012,"fp":"FY","form":"8-K","filed":"2013-04-18","frame":"CY2012Q4I"},{"end":"2013-12-31","val":0,"accn":"0000912513-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-21","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0,"accn":"0000912513-15-000002","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2014Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour":{"label":"Long-Term Debt, Maturity, Year Four","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. 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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2011-12-31","val":135400000,"accn":"0001193125-12-078446","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":135400000,"accn":"0001193125-12-170541","fy":2011,"fp":"FY","form":"8-K","filed":"2012-04-19","frame":"CY2011Q4I"},{"end":"2012-12-31","val":400000,"accn":"0001193125-13-073864","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-25"},{"end":"2012-12-31","val":400000,"accn":"0001193125-13-160937","fy":2012,"fp":"FY","form":"8-K","filed":"2013-04-18","frame":"CY2012Q4I"},{"end":"2013-12-31","val":142100000,"accn":"0000912513-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-21","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0,"accn":"0000912513-15-000002","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2014Q4I"}]}},"LongTermDebtNoncurrent":{"label":"Long-term Debt, Excluding Current Maturities","description":"Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. 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Assets, Current","description":"Amount of current assets classified as 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That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the 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