Derivative Financial Instruments - Summary of Impact of Effective Portion of Gains and Losses of Forward Contracts Designated as Hedges (Details) - Forward foreign currency exchange contracts - Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Loss Recognized in OCI (Effective Portion)	$ (6.0)	$ (1.2)	$ (15.3)	$ 2.1
Pre-Tax Gain Reclassified from Accumulated OCI into Earnings (Effective Portion)	$ 1.3	$ 0.3	$ 3.2	$ 0.2