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Interest on Borrowings (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] |  |  |
Interest paid in cash including payments related to derivative contracts | $ 149.8 | $ 129.3 | $ 113.7

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- Definition Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 + Details
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Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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