Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2017 USD ($) shares	Oct. 01, 2016 shares	Sep. 30, 2017 USD ($) shares	Oct. 01, 2016 USD ($) shares	Jul. 25, 2017 GBP (£)	Apr. 01, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax deficit recognized in provision of income taxes	$ 5.0		$ 0.1
Anti-dilutive securities excluded from calculation of basic and diluted net income per ordinary share (in shares) | shares	2,782,083	2,000,778	2,633,955	2,049,980
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Forward contracts term, maximum (no more than)			12 months
Forward foreign currency exchange contracts
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Derivative notional amount	$ 1,645.2		$ 1,645.2			$ 167.5
Forward foreign currency exchange contracts | Not Designated as Hedging Instrument
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Derivative notional amount	$ 1,468.6		$ 1,468.6		£ 1,115,000,000.000	$ 0.0
ASU 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by (used in) financing activities				$ (2.8)
Net cash provided by (used in) operating activities				$ 2.8