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Income Taxes - Income from Continuing Operations and Income Tax Expense (Benefit) by Jurisdiction (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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May 03, 2014 | Apr. 27, 2013 | Apr. 28, 2012
Income Tax Disclosure [Abstract] |  |  |
Undistributed foreign earnings | $ 198.7 |  |
Components of Income/(Loss) Before Income Taxes [Abstract] |  |  |
Domestic source | 21.0 | (1.2) | (32.4)
Foreign source | 54.9 | 39.1 | 43.8
Income before income taxes | 75.9 | 37.9 | 11.4
Current |  |  |
Federal | 0.2 | 0 | 0
Foreign | 8.0 | 4.6 | 5.7
State | 0.7 | 0.1 | (0.5)
Subtotal | 8.9 | 4.7 | 5.2
Deferred |  |  |
Federal and state | (31.7) | 0 | 0.1
Foreign | 2.5 | (7.2) | (2.1)
Subtotal | (29.2) | (7.2) | (2.0)
Income tax expense/(benefit) | $ (20.3) | $ (2.5) | $ 3.2

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