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Income Taxes - Deferred Income Taxes - Undistributed Earnings - Narrative (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Aug. 03, 2014
Jul. 28, 2013
Apr. 27, 2014
Income Tax Disclosure [Abstract]      
Deferred tax liability, undistributed earnings from foreign subsidiaries $ 2.1 $ 7.1 $ 2.0
U.S. income and foreign withholding taxes 29.4 22.3 28.1
U.S. foreign income tax credits 27.3 15.2 26.1
Undistributed earnings from our foreign subsidiaries that will not be reinvested indefinitely $ 75.8 $ 57.5 $ 72.8