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Common stock represent the ownership interest in a 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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' 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Notional amount refers to the monetary amount specified in the interest rate derivative contract.","units":{"USD":[{"end":"2004-12-31","val":125000000,"accn":"0001193125-13-083986","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2004Q4I"},{"end":"2004-12-31","val":125000000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"}]}},"NumberOfStatesInWhichEntityOperates":{"label":"Number of States in which Entity Operates","description":"The number of states the entity operates in as of the balance sheet date.","units":{"pure":[{"end":"2015-07-31","val":15,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2015Q2I"}],"states":[{"end":"2015-07-31","val":15,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015Q2I"}]}},"OperatingLeasesFutureMinimumPaymentsDue":{"label":"Operating Leases, Future Minimum Payments Due","description":"Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.","units":{"USD":[{"end":"2011-06-30","val":53172000000,"accn":"0000950123-11-074874","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2011Q2I"},{"end":"2011-09-30","val":74141000000,"accn":"0000950123-11-096283","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-08","frame":"CY2011Q3I"},{"end":"2011-12-31","val":70857000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29","frame":"CY2011Q4I"},{"end":"2012-03-31","val":67836000,"accn":"0001193125-12-217876","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-08","frame":"CY2012Q1I"},{"end":"2012-06-30","val":63322000,"accn":"0001193125-12-340466","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-07","frame":"CY2012Q2I"},{"end":"2012-09-30","val":87139000,"accn":"0001193125-12-456811","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-07","frame":"CY2012Q3I"},{"end":"2012-12-31","val":117932000,"accn":"0001193125-13-083986","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"},{"end":"2013-03-31","val":113967000,"accn":"0001193125-13-207048","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1I"},{"end":"2013-06-30","val":108003000,"accn":"0001193125-13-326344","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":100207000,"accn":"0001193125-13-432266","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2013Q3I"},{"end":"2013-12-31","val":109808000,"accn":"0001193125-14-067455","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-25","frame":"CY2013Q4I"},{"end":"2014-03-31","val":107435000,"accn":"0001193125-14-194386","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":103997000,"accn":"0001193125-14-300199","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-07","frame":"CY2014Q2I"},{"end":"2014-09-30","val":100201000,"accn":"0001445305-14-004922","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-07","frame":"CY2014Q3I"},{"end":"2014-12-31","val":96783000,"accn":"0001179755-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-03-31","val":101581000,"accn":"0001179755-15-000015","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-06","frame":"CY2015Q1I"},{"end":"2015-06-30","val":97907000,"accn":"0001179755-15-000041","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07","frame":"CY2015Q2I"},{"end":"2015-09-30","val":112011000,"accn":"0001179755-15-000066","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06","frame":"CY2015Q3I"},{"end":"2015-12-31","val":105002000,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2015Q4I"},{"end":"2016-03-31","val":101857000,"accn":"0001179755-16-000116","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-09","frame":"CY2016Q1I"},{"end":"2016-06-30","val":97733000,"accn":"0001179755-16-000141","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-08","frame":"CY2016Q2I"},{"end":"2016-09-30","val":93079000,"accn":"0001179755-16-000149","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-07","frame":"CY2016Q3I"},{"end":"2016-12-31","val":201862000,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016Q4I"},{"end":"2017-03-31","val":199594000,"accn":"0001179755-17-000050","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2017Q1I"}]}},"OperatingLeasesFutureMinimumPaymentsDueCurrent":{"label":"Operating Leases, Future Minimum Payments Due, Next Twelve Months","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 next 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":"2011-06-30","val":5338000000,"accn":"0000950123-11-074874","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2011Q2I"},{"end":"2011-09-30","val":7626000000,"accn":"0000950123-11-096283","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-08","frame":"CY2011Q3I"},{"end":"2011-12-31","val":7412000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29","frame":"CY2011Q4I"},{"end":"2012-03-31","val":6921000,"accn":"0001193125-12-217876","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-08","frame":"CY2012Q1I"},{"end":"2012-06-30","val":6019000,"accn":"0001193125-12-340466","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-07","frame":"CY2012Q2I"},{"end":"2012-09-30","val":8052000,"accn":"0001193125-12-456811","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-07","frame":"CY2012Q3I"},{"end":"2012-12-31","val":10382000,"accn":"0001193125-13-083986","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"},{"end":"2013-03-31","val":10148000,"accn":"0001193125-13-207048","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1I"},{"end":"2013-06-30","val":10011000,"accn":"0001193125-13-326344","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":9791000,"accn":"0001193125-13-432266","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2013Q3I"},{"end":"2013-12-31","val":11683000,"accn":"0001193125-14-067455","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-25","frame":"CY2013Q4I"},{"end":"2014-12-31","val":10936000,"accn":"0001179755-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-12-31","val":15986000,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2015Q4I"},{"end":"2016-12-31","val":21060000,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInRollingAfterYearFive":{"label":"Operating Leases, Future Minimum Payments, Due in Rolling after Year Five","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 after the fifth rolling twelve months following the latest balance sheet. 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Stock, Redemption Price Per Share","description":"The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.","units":{"USD/shares":[{"end":"2011-06-01","val":25,"accn":"0000950123-11-096283","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-08","frame":"CY2011Q2I"},{"end":"2011-06-01","val":25,"accn":"0000950123-11-074874","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"end":"2012-12-31","val":25,"accn":"0001193125-13-083986","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"},{"end":"2013-12-31","val":25,"accn":"0001193125-14-067455","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-25","frame":"CY2013Q4I"}]}},"PreferredStockSharesAuthorized":{"label":"Preferred Stock, Shares Authorized","description":"The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.","units":{"shares":[{"end":"2010-12-31","val":8000000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29","frame":"CY2010Q4I"},{"end":"2011-12-31","val":17200000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"end":"2011-12-31","val":17200000,"accn":"0001193125-13-083986","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2012-12-31","val":17200000,"accn":"0001193125-13-083986","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2012-12-31","val":17200000,"accn":"0001193125-14-067455","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-25","frame":"CY2012Q4I"},{"end":"2013-12-31","val":17200000,"accn":"0001193125-14-067455","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-25"},{"end":"2013-12-31","val":17200000,"accn":"0001179755-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2013Q4I"},{"end":"2014-12-31","val":17200000,"accn":"0001179755-15-000006","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27"},{"end":"2014-12-31","val":17200000,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2014Q4I"},{"end":"2015-12-31","val":9209200,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26"},{"end":"2015-12-31","val":9209200,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015Q4I"},{"end":"2016-12-31","val":9200,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016Q4I"}]}},"PreferredStockSharesIssued":{"label":"Preferred Stock, Shares Issued","description":"Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.","units":{"shares":[{"end":"2009-12-31","val":8000000,"accn":"0000950123-10-074199","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"end":"2009-12-31","val":8000000,"accn":"0000950123-10-102192","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-08"},{"end":"2009-12-31","val":8000000,"accn":"0000950123-11-020635","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-01","frame":"CY2009Q4I"},{"end":"2010-06-30","val":8000000,"accn":"0000950123-10-074199","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06","frame":"CY2010Q2I"},{"end":"2010-09-30","val":8000000,"accn":"0000950123-10-102192","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-08","frame":"CY2010Q3I"},{"end":"2010-12-31","val":8000000,"accn":"0000950123-11-020635","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-01"},{"end":"2010-12-31","val":8000000,"accn":"0000950123-11-047936","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-10"},{"end":"2010-12-31","val":8000000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29","frame":"CY2010Q4I"},{"end":"2011-03-31","val":8000000,"accn":"0000950123-11-047936","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-10","frame":"CY2011Q1I"},{"end":"2011-06-01","val":9200000,"accn":"0000950123-11-096283","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-08","frame":"CY2011Q2I"},{"end":"2011-12-31","val":17200000,"accn":"0001193125-12-087522","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29","frame":"CY2011Q4I"},{"end":"2014-12-31","val":17200000,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2014Q4I"},{"end":"2015-12-31","val":9209200,"accn":"0001179755-16-000096","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26"},{"end":"2015-12-31","val":9209200,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015Q4I"},{"end":"2016-12-31","val":9200,"accn":"0001179755-17-000008","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016Q4I"}]}},"PreferredStockSharesOutstanding":{"label":"Preferred Stock, Shares Outstanding","description":"Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. 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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' 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aringOrganizations":{"label":"Receivables 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