Recent Accounting Changes and Accounting Pronouncements Change in Accounting Policy- Diluted EPS Impact (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Oct. 01, 2016	Oct. 01, 2016
Accounting Policies [Abstract]
Effective Income Tax Rate Reconciliation, Excess Tax Benefit, Share-based Compensation, Amount	$ 2.9	$ 9.7
DilutedEarningsPerShareIncrease,ExcessTaxBenefit,Share-basedCompensation	$ 0.01	$ 0.03