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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

X

- 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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
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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

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-Publisher FASB
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

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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

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-Name Accounting Standards Codification
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