Segment, Geographic, And Significant Customer Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 28, 2011	Oct. 29, 2010	Oct. 28, 2011	Oct. 29, 2010	Apr. 29, 2011
Segment Reporting Information [Line Items]
Accounts Receivable, net	$ 625.2		$ 625.2		$ 742.6
Number of foreign countries accounting for ten percent or more of net revenues	0		0
Net revenues	1,507.0	1,251.0	2,965.2	2,404.7
Arrow Electronics, Inc. [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, net	69.9		69.9		101.4
Avnet, Inc. [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, net	67.2		67.2		107.5
Germany [Member]
Segment Reporting Information [Line Items]
Net revenues		$ 156.3		$ 296.9