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Derivative Instruments (Tables) | 12 Months Ended
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Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location | The following table summarizes the location and amount of the gain or loss on the hedged item attributable to the changes in the LIBOR swap rate and the offsetting gain or loss on the related interest rate swap agreements for the year ended March 31, 2016. The difference represents hedge ineffectiveness (amounts in millions):
| Year ended March 31,
| 2016
Income Statement Classification | Gain (Loss) on 2015 Senior Debt |  | Gain (Loss) on Interest Rate Swap
Other (loss) income, net | $ | (18.1 | ) |  | $ | 16.3 |

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- Definition Tabular disclosure for fair value hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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