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Income Taxes - Schedule of Components of Income before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 30, 2016
May 02, 2015
May 03, 2014
Components of Income/(Loss) Before Income Taxes [Abstract]      
Domestic source $ 25.3 $ 39.9 $ 21.0
Foreign source 85.6 80.9 54.9
Income/(loss) before income taxes $ 110.9 $ 120.8 $ 75.9