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Income Taxes - Schedule of Components of Income before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
May. 02, 2015
May. 03, 2014
Apr. 27, 2013
Components of Income/(Loss) Before Income Taxes [Abstract]      
Domestic source $ 39.9 $ 21.0 $ (1.2)
Foreign source 80.9 54.9 39.1
Income/(loss) before income taxes $ 120.8 $ 75.9 $ 37.9