Current Assets and Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2017	Apr. 01, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other taxes payable	$ 42.0	$ 29.2
Accrued rent	25.3	21.5
Accrued advertising and marketing	23.5	10.7
Accrued capital expenditures	15.6	20.5
Professional services	14.0	7.1
Gift cards and retail store credits	12.6	12.9
Unrealized loss on forward foreign currency exchange contracts	11.3	0.4
Advance royalties	7.1	5.0
Other	37.3	27.7
Accrued expenses and other current liabilities	$ 188.7	$ 135.0