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Significant Accounting Policies (Other) (Details) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2017 USD ($) segment | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |
Number of reporting units with goodwill | segment | 3 |  |
Advertising expenses | $ 588.8 | $ 470.2 | $ 400.0
Minimum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 20.00% |  |
Maximum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 50.00% |  |
Percentage ownership interest in limited liability partnership or limited liability corporation in which significant influence is presumed | 20.00% |  |
Presentation of Debt Issuance Costs |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Reclassification of debt issuance costs |  | $ 21.3 |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The number of units or percentage investment held by one or more members or limited partners of the LLC or LP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reporting Unit -URI http://asc.fasb.org/extlink&oid=6523643 + Details
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