Supplemental Cash Flows Information 2 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Oct. 28, 2009	Apr. 28, 2010	Apr. 29, 2012	Apr. 27, 2011
Supplemental Cash Flow Information [Line Items]
Cash paid in exchange of outstanding dealer remarketable securities	$ 217.5	$ 217.5
Outstanding dealer remarketable securities	681	681
Property, plant and equipment and debt related to contractual arrangements		41.8
Trade receivables sold without recourse			205.6	145.7
7.125% U.S. Dollar Notes due August 2039 [Member]
Supplemental Cash Flow Information [Line Items]
Notes issued	$ 681	$ 681
Debt Instrument, Maturity Period		30 years