Intangible Assets, net (Schedule of Reconciliation of Activity Affecting Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Mar. 31, 2017
Indefinite-Lived Intangible Assets [Abstract]
Indefinite Lived Trademarks, beginning balance	$ 2,589,155
Indefinite Lived Trademarks, ending balance	2,591,223
Finite-lived Intangible Assets, Accumulated Amortization [Abstract]
Finite Lived Trademarks and Customer Relationships, accumulated amortization, beginning balance	127,343
Accumulated amortization, additions	11,683
Accumulated amortization, effects of foreign exchange rates	14
Finite Lived Trademarks and Customer Relationships, accumulated amortization, ending balance	139,040
Intangible Assets, Gross [Abstract]
Totals, gross, beginning balance	3,030,956
Totals, effects of foreign currency exchange rate	2,224
Totals, gross, ending balance	3,033,180
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived, net	302,917	$ 314,458
Intangible Assets, Net [Abstract]
Intangible assets, net	2,894,140	$ 2,903,613
Finite Lived Trademarks and Customer Relationships
Finite-Lived Intangible Assets, Gross [Abstract]
Finite Lived Trademarks and Customer Relationships, beginning balance	441,801
Finite Lived Trademarks and Customer Relationships, effects of foreign currency exchange rate	156
Finite Lived Trademarks and Customer Relationships, ending balance	441,957
Finite-lived Intangible Assets, Accumulated Amortization [Abstract]
Finite Lived Trademarks and Customer Relationships, accumulated amortization, beginning balance	127,343
Accumulated amortization, additions	11,683
Accumulated amortization, effects of foreign exchange rates	14
Finite Lived Trademarks and Customer Relationships, accumulated amortization, ending balance	139,040
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived, net	302,917
Indefinite Lived Trademarks
Indefinite-Lived Intangible Assets [Abstract]
Indefinite Lived Trademarks, beginning balance	2,589,155
Indefinite Lived Trademarks, effects of foreign currency exchange rate	2,068
Indefinite Lived Trademarks, ending balance	$ 2,591,223