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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Mar. 31, 2018
Operating Loss Carryforwards [Line Items]
Effective tax rate	17.30%	21.20%	12.70%	18.00%
Unrecognized tax benefits	$ 126.6		$ 126.6		$ 107.4
Decrease in unrecognized tax benefits is possible in the next twelve months	$ 37.8		$ 37.8
United Kingdom | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Provision for incomes taxes at the U.K. statutory tax rate	19.00%

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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