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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2010-12-31","val":202000000,"accn":"0001193125-11-040023","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-18"},{"end":"2010-12-31","val":202000000,"accn":"0000029915-11-000044","fy":2010,"fp":"FY","form":"8-K","filed":"2011-11-01","frame":"CY2010Q4I"},{"end":"2011-12-31","val":223000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2011Q4I"},{"end":"2012-12-31","val":223000000,"accn":"0000029915-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-15","frame":"CY2012Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInFiveYears":{"label":"Operating Leases, Future Minimum Payments, Due in Five Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. 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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2010-12-31","val":126000000,"accn":"0001193125-11-040023","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-18"},{"end":"2010-12-31","val":126000000,"accn":"0000029915-11-000044","fy":2010,"fp":"FY","form":"8-K","filed":"2011-11-01","frame":"CY2010Q4I"},{"end":"2011-12-31","val":146000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2011Q4I"},{"end":"2012-12-31","val":150000000,"accn":"0000029915-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-15","frame":"CY2012Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Operating Leases, Future Minimum Payments, Due in Three Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2010-12-31","val":149000000,"accn":"0001193125-11-040023","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-18"},{"end":"2010-12-31","val":149000000,"accn":"0000029915-11-000044","fy":2010,"fp":"FY","form":"8-K","filed":"2011-11-01","frame":"CY2010Q4I"},{"end":"2011-12-31","val":176000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2011Q4I"},{"end":"2012-12-31","val":177000000,"accn":"0000029915-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-15","frame":"CY2012Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInTwoYears":{"label":"Operating Leases, Future Minimum Payments, Due in Two Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. 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Loss Carryforwards","description":"Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.","units":{"USD":[{"end":"2009-12-31","val":4550000000,"accn":"0001193125-11-040023","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-18"},{"end":"2009-12-31","val":4550000000,"accn":"0000029915-11-000044","fy":2010,"fp":"FY","form":"8-K","filed":"2011-11-01","frame":"CY2009Q4I"},{"end":"2010-12-31","val":4572000000,"accn":"0001193125-11-040023","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-18"},{"end":"2010-12-31","val":4572000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2010Q4I"},{"end":"2010-12-31","val":4572000000,"accn":"0000029915-11-000044","fy":2010,"fp":"FY","form":"8-K","filed":"2011-11-01"},{"end":"2011-12-31","val":11626000000,"accn":"0000029915-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-15","frame":"CY2011Q4I"},{"end":"2011-12-31","val":4859000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15"},{"end":"2012-12-31","val":10436000000,"accn":"0000029915-14-000011","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-14","frame":"CY2012Q4I"},{"end":"2012-12-31","val":10436000000,"accn":"0000029915-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-15"},{"end":"2013-12-31","val":11435000000,"accn":"0000029915-15-000011","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-13","frame":"CY2013Q4I"},{"end":"2013-12-31","val":11435000000,"accn":"0000029915-14-000011","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-14"},{"end":"2014-12-31","val":11080000000,"accn":"0000029915-16-000066","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-12","frame":"CY2014Q4I"},{"end":"2014-12-31","val":11080000000,"accn":"0000029915-15-000011","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-13"},{"end":"2015-12-31","val":10364000000,"accn":"0000029915-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-09","frame":"CY2015Q4I"},{"end":"2015-12-31","val":10364000000,"accn":"0000029915-16-000066","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-12"},{"end":"2016-12-31","val":10580000000,"accn":"0000029915-17-000011","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-09","frame":"CY2016Q4I"}]}},"OtherAssetImpairmentCharges":{"label":"Other Asset Impairment Charges","description":"The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":454000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2009"},{"start":"2009-01-01","end":"2009-12-31","val":464000000,"accn":"0000029915-11-000044","fy":2010,"fp":"FY","form":"8-K","filed":"2011-11-01"},{"start":"2010-01-01","end":"2010-12-31","val":75000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":27000000,"accn":"0000029915-12-000008","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-15","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":94000000,"accn":"0000029915-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-02","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":94000000,"accn":"0000029915-12-000030","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-01"},{"start":"2012-01-01","end":"2012-09-30","val":123000000,"accn":"0000029915-12-000040","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-30"}]}},"OtherAssetsCurrent":{"label":"Other 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