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Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2012-06-30","val":31348756,"accn":"0001193125-12-365400","fy":2012,"fp":"Q2","form":"10-Q/A","filed":"2012-08-22","frame":"CY2012Q2I"},{"end":"2012-09-30","val":41346762,"accn":"0001193125-12-465930","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":44334240,"accn":"0001193125-13-136685","fy":2012,"fp":"FY","form":"10-K","filed":"2013-04-01","frame":"CY2012Q4I"},{"end":"2013-03-31","val":44207198,"accn":"0001193125-13-222239","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-15","frame":"CY2013Q1I"},{"end":"2013-12-31","val":43700742,"accn":"0001193125-14-123966","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"},{"end":"2014-12-31","val":40263061,"accn":"0001144204-15-015657","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","frame":"CY2014Q4I"},{"end":"2015-12-31","val":57169000,"accn":"0001144204-17-014878","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2015Q4I"},{"end":"2015-12-31","val":57169000,"accn":"0001144204-16-132560","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09"},{"end":"2015-12-31","val":57169000,"accn":"0001144204-16-117619","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":39721000,"accn":"0001144204-16-088193","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15"},{"end":"2016-06-30","val":53757000,"accn":"0001144204-16-117619","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":56911000,"accn":"0001144204-16-132560","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09","frame":"CY2016Q3I"},{"end":"2016-12-31","val":62842000,"accn":"0001144204-17-041388","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2016Q4I"},{"end":"2016-12-31","val":62842000,"accn":"0001144204-17-025791","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10"},{"end":"2016-12-31","val":62842000,"accn":"0001144204-17-014878","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16"},{"end":"2017-03-31","val":56055000,"accn":"0001144204-17-025791","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2017Q1I"},{"end":"2017-06-30","val":56118000,"accn":"0001144204-17-041388","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"}]}},"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":"2014-12-31","val":0,"accn":"0001144204-15-015657","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","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":"2012-06-30","val":8269,"accn":"0001193125-12-365400","fy":2012,"fp":"Q2","form":"10-Q/A","filed":"2012-08-22","frame":"CY2012Q2I"},{"end":"2012-09-30","val":508387,"accn":"0001193125-12-465930","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":633498,"accn":"0001193125-13-136685","fy":2012,"fp":"FY","form":"10-K","filed":"2013-04-01","frame":"CY2012Q4I"},{"end":"2013-03-31","val":633646,"accn":"0001193125-13-222239","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-15","frame":"CY2013Q1I"},{"end":"2013-12-31","val":3502190,"accn":"0001193125-14-123966","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"},{"end":"2014-12-31","val":542201,"accn":"0001144204-15-015657","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","frame":"CY2014Q4I"},{"end":"2015-12-31","val":5012000,"accn":"0001144204-16-088193","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2015Q4I"}]}},"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":"2012-06-30","val":28334000,"accn":"0001193125-12-365400","fy":2012,"fp":"Q2","form":"10-Q/A","filed":"2012-08-22","frame":"CY2012Q2I"},{"end":"2012-09-30","val":36334000,"accn":"0001193125-12-465930","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-13","frame":"CY2012Q3I"},{"end":"2012-12-31","val":39198552,"accn":"0001193125-13-136685","fy":2012,"fp":"FY","form":"10-K","filed":"2013-04-01","frame":"CY2012Q4I"},{"end":"2013-03-31","val":39073552,"accn":"0001193125-13-222239","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-15","frame":"CY2013Q1I"},{"end":"2014-12-31","val":0,"accn":"0001144204-15-015657","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-12","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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