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The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001193125-16-513478","fy":2015,"fp":"FY","form":"20-F","filed":"2016-03-22","frame":"CY2014Q4I"},{"end":"2015-12-31","val":6500000,"accn":"0001193125-16-513478","fy":2015,"fp":"FY","form":"20-F","filed":"2016-03-22"},{"end":"2015-12-31","val":6500000,"accn":"0001193125-16-685713","fy":2016,"fp":"Q2","form":"6-K","filed":"2016-08-19"},{"end":"2015-12-31","val":6500000,"accn":"0001193125-17-111949","fy":2016,"fp":"FY","form":"20-F","filed":"2017-04-05","frame":"CY2015Q4I"},{"end":"2016-06-30","val":4500000,"accn":"0001193125-16-685713","fy":2016,"fp":"Q2","form":"6-K","filed":"2016-08-19","frame":"CY2016Q2I"},{"end":"2016-12-31","val":2500000,"accn":"0001193125-17-111949","fy":2016,"fp":"FY","form":"20-F","filed":"2017-04-05"},{"end":"2016-12-31","val":2500000,"accn":"0001193125-17-261020","fy":2017,"fp":"Q2","form":"6-K","filed":"2017-08-17"},{"end":"2016-12-31","val":2500000,"accn":"0001193125-18-108214","fy":2017,"fp":"FY","form":"20-F","filed":"2018-04-05","frame":"CY2016Q4I"},{"end":"2017-06-30","val":750000,"accn":"0001193125-17-261020","fy":2017,"fp":"Q2","form":"6-K","filed":"2017-08-17","frame":"CY2017Q2I"},{"end":"2017-12-31","val":0,"accn":"0001193125-18-108214","fy":2017,"fp":"FY","form":"20-F","filed":"2018-04-05","frame":"CY2017Q4I"}]}},"RedeemableNoncontrollingInterestEquityPreferredCarryingAmount":{"label":"Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount","description":"As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of preferred shares (regardless of class), preferred partnership units (regardless of class), preferential membership interests, or any other form of preferred equity regardless of investee entity legal form.","units":{"USD":[{"end":"2014-12-31","val":12000000,"accn":"0001193125-16-513478","fy":2015,"fp":"FY","form":"20-F","filed":"2016-03-22","frame":"CY2014Q4I"},{"end":"2015-12-31","val":0,"accn":"0001193125-16-513478","fy":2015,"fp":"FY","form":"20-F","filed":"2016-03-22","frame":"CY2015Q4I"}]}},"RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty":{"label":"Related Party Transaction, Expenses from Transactions with Related Party","description":"Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.","units":{"USD":[{"start":"2016-01-01","end":"2016-06-30","val":730000,"accn":"0001193125-16-685713","fy":2016,"fp":"Q2","form":"6-K","filed":"2016-08-19"},{"start":"2016-04-02","end":"2016-06-30","val":730000,"accn":"0001193125-16-685713","fy":2016,"fp":"Q2","form":"6-K","filed":"2016-08-19","frame":"CY2016Q2"}]}},"RepaymentsOfDebt":{"label":"Repayments of Debt","description":"The cash outflow during the period from the repayment of aggregate short-term and long-term debt. 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