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Income Taxes - Schedule of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2016	May 02, 2015	May 03, 2014
Current
Federal	$ 2.8	$ 5.4	$ 0.2
Foreign	14.7	13.8	8.0
State	0.6	0.9	0.7
Subtotal	18.1	20.1	8.9
Deferred
Federal and state	5.5	6.0	(31.7)
Foreign	2.7	(6.3)	2.5
Subtotal	8.2	(0.3)	(29.2)
Total income tax/(benefit)	$ 26.3	$ 19.8	$ (20.3)

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