Current Assets and Current Liabilities - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2018	Apr. 01, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other taxes payable	$ 54.3	$ 29.2
Restructuring liability	44.8	0.0
Accrued rent	34.5	21.5
Accrued capital expenditures	26.4	20.5
Accrued advertising and marketing	22.6	10.7
Gift cards and retail store credits	16.0	12.9
Professional services	14.1	7.1
Accrued interest	8.7	0.3
Unrealized loss on forward foreign exchange contracts	7.7	0.4
Deferred income	4.3	0.1
Advance royalties	4.1	5.0
Other	58.1	27.3
Accrued expenses and other current liabilities	$ 295.6	$ 135.0