Fiscal 2012 Productivity Initiatives 1 (Details) (Productivity Initatives [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 28, 2012	Oct. 26, 2011	Oct. 28, 2012	Oct. 26, 2011 positions
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ 37.3		$ 77.8
Restructuring and Related Cost, Incurred Cost, After Tax		25.5		54.0
Restructuring and Related Cost, Incurred Cost, Per Share Amount		$ 0.08	$ 0.17
Asset Impairment Charges		11.8		28.6
Severance Costs		14.1		29.0
Restructuring and Related Cost, Number of Positions Eliminated				450
Other Restructuring Costs		11.4		20.2
Restructuring and Related Cost, Incurred Cost, Cost of Products Sold		27.5		58.8
Restructuring and Related Cost, Incurred Cost, Selling General and Administrative Expense		9.9		19.0
Payments for restructuring	$ 42.0			$ 29.1
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of Factories				5
Europe [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of Factories				2
UNITED STATES | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of Factories				2
Asia Pacific [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of Factories				1