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Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.","units":{"USD":[{"start":"2010-07-01","end":"2011-06-30","val":100000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011"},{"start":"2011-07-01","end":"2012-06-30","val":100000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29"},{"start":"2011-07-01","end":"2012-06-30","val":100000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012"},{"start":"2012-07-01","end":"2013-06-30","val":35000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23"},{"start":"2012-07-01","end":"2013-06-30","val":35000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2013"},{"start":"2013-07-01","end":"2014-06-30","val":37000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25"},{"start":"2013-07-01","end":"2014-06-30","val":37000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2014"},{"start":"2014-07-01","end":"2015-06-30","val":27000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25"},{"start":"2014-07-01","end":"2015-06-30","val":27000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2015"},{"start":"2015-07-01","end":"2016-06-30","val":37000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016"}]}},"AssetRetirementObligationsNoncurrent":{"label":"Asset Retirement Obligations, Noncurrent","description":"Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. 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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":"2011-06-30","val":197424000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011Q2I"},{"end":"2012-06-30","val":215992000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29"},{"end":"2012-06-30","val":215992000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012Q2I"},{"end":"2013-06-30","val":220244000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23"},{"end":"2013-06-30","val":220244000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2013Q2I"},{"end":"2014-06-30","val":274098000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25"},{"end":"2014-06-30","val":274098000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":204936000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25"},{"end":"2015-06-30","val":204936000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2015Q2I"},{"end":"2016-06-30","val":272825000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28"},{"end":"2016-06-30","val":269672000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":291347000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","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":"2012-06-30","val":59029000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2012Q2I"},{"end":"2015-06-30","val":0,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015Q2I"},{"end":"2016-06-30","val":0,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":0,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"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":575000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2012Q2I"},{"end":"2014-06-30","val":47060000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":0,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015Q2I"},{"end":"2016-06-30","val":35000000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":0,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"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":35000000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2012Q2I"},{"end":"2013-06-30","val":137706000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2013Q2I"},{"end":"2014-06-30","val":70291000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":50421000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015Q2I"},{"end":"2016-06-30","val":0,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":237588000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"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. 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":49995000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2012Q2I"},{"end":"2013-06-30","val":35000000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2013Q2I"},{"end":"2014-06-30","val":121747000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":60048000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015Q2I"},{"end":"2016-06-30","val":120129000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":0,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree":{"label":"Long-Term Debt, Maturity, Year Three","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 third 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":71393000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2012Q2I"},{"end":"2014-06-30","val":35000000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":59467000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015Q2I"},{"end":"2016-06-30","val":58063000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":0,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo":{"label":"Long-Term Debt, Maturity, Year Two","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 second 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":"2013-06-30","val":47538000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2013Q2I"},{"end":"2014-06-30","val":0,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":35000000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015Q2I"},{"end":"2016-06-30","val":59633000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":57795000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"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. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2011-06-30","val":161624000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011Q2I"},{"end":"2012-06-30","val":215417000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29"},{"end":"2012-06-30","val":215417000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012Q2I"},{"end":"2013-06-30","val":220244000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23"},{"end":"2013-06-30","val":220244000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2013Q2I"},{"end":"2014-06-30","val":273898000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25"},{"end":"2014-06-30","val":273898000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2014Q2I"},{"end":"2015-06-30","val":204936000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25"},{"end":"2015-06-30","val":204936000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2015Q2I"},{"end":"2016-06-30","val":272825000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28"},{"end":"2016-06-30","val":269672000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2016Q2I"},{"end":"2017-06-30","val":291347000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017Q2I"}]}},"NetCashProvidedByUsedInFinancingActivities":{"label":"Net Cash Provided by (Used in) Financing Activities","description":"Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.","units":{"USD":[{"start":"2010-07-01","end":"2011-06-30","val":31542000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011"},{"start":"2011-07-01","end":"2012-06-30","val":75649000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012"},{"start":"2011-07-01","end":"2012-06-30","val":75649000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29"},{"start":"2012-07-01","end":"2013-06-30","val":-10618000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2013"}]}},"NetCashProvidedByUsedInFinancingActivitiesContinuingOperations":{"label":"Net Cash Provided by (Used in) Financing Activities, Continuing Operations","description":"Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. 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Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.","units":{"USD":[{"start":"2010-07-01","end":"2011-06-30","val":-65670000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011"},{"start":"2011-07-01","end":"2012-06-30","val":-109451000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012"},{"start":"2011-07-01","end":"2012-06-30","val":-109451000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29"},{"start":"2012-07-01","end":"2013-06-30","val":-39418000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2013"}]}},"NetCashProvidedByUsedInInvestingActivitiesContinuingOperations":{"label":"Net Cash Provided by (Used in) Investing Activities, Continuing Operations","description":"Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.","units":{"USD":[{"start":"2012-07-01","end":"2013-06-30","val":-39418000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25","frame":"CY2013"},{"start":"2013-07-01","end":"2014-06-30","val":-59397000,"accn":"0001193125-14-353312","fy":2014,"fp":"FY","form":"40-F","filed":"2014-09-25"},{"start":"2013-07-01","end":"2014-06-30","val":-59397000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2014"},{"start":"2014-07-01","end":"2015-06-30","val":-33698000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25"},{"start":"2014-07-01","end":"2015-06-30","val":-33698000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28","frame":"CY2015"},{"start":"2015-07-01","end":"2016-06-30","val":-70952000,"accn":"0001193125-16-723463","fy":2016,"fp":"FY","form":"40-F","filed":"2016-09-28"},{"start":"2015-07-01","end":"2016-06-30","val":-70952000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2016"},{"start":"2016-07-01","end":"2017-06-30","val":-29095000,"accn":"0001193125-17-297942","fy":2017,"fp":"FY","form":"40-F","filed":"2017-09-28","frame":"CY2017"}]}},"NetCashProvidedByUsedInOperatingActivities":{"label":"Net Cash Provided by (Used in) Operating Activities","description":"Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.","units":{"USD":[{"start":"2010-07-01","end":"2011-06-30","val":32071000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011"},{"start":"2011-07-01","end":"2012-06-30","val":34910000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012"},{"start":"2011-07-01","end":"2012-06-30","val":34910000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29"},{"start":"2012-07-01","end":"2013-06-30","val":52099000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2013"}]}},"NetCashProvidedByUsedInOperatingActivitiesContinuingOperations":{"label":"Net Cash Provided by (Used in) Operating Activities, Continuing Operations","description":"Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing 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This element is used when state law does not recognize treasury stock.","units":{"USD":[{"start":"2014-07-01","end":"2015-06-30","val":800000,"accn":"0001193125-15-328884","fy":2015,"fp":"FY","form":"40-F","filed":"2015-09-25","frame":"CY2015"}]}},"StockRepurchaseProgramAuthorizedAmount":{"label":"Stock Repurchase Program, Authorized Amount (Deprecated 2014-01-31)","description":"Amount of a stock repurchase plan authorized by an entity's Board of Directors.","units":{"CAD":[{"start":"2010-10-25","end":"2011-10-24","val":5000000,"accn":"0001193125-12-439311","fy":2012,"fp":"FY","form":"40-F/A","filed":"2012-10-29","frame":"CY2011"},{"start":"2011-10-25","end":"2012-10-24","val":5000000,"accn":"0001193125-13-374477","fy":2013,"fp":"FY","form":"40-F","filed":"2013-09-23","frame":"CY2012"}]}},"TaxesPayableCurrent":{"label":"Taxes Payable, Current","description":"Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. 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