Derivative Financial Instruments and Hedging Activities 2 (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Oct. 26, 2011	Oct. 27, 2010	Oct. 26, 2011	Oct. 27, 2010
Foreign Exchange Contract [Member]
Cash flow hedges:
Net (losses)/gains recognized in other comprehensive loss (effective portion)	$ 10,945	$ (3,861)	$ 18,331	$ (7,027)
Net gains/(losses) reclassified from other comprehensive loss into earnings (effective portion):
Sales	1,989	296	4,093	676
Cost of products sold	(4,216)	(5,394)	(9,804)	(9,188)
Selling, general and administrative expenses	(18)	(39)	105	(136)
Other (expense)/income, net	2,853	3,294	8,003	(348)
Interest income/(expense)	74	14	181	12
Total	682	(1,829)	2,578	(8,984)
Fair value hedges:
Net (losses)/gains recognized in other (expense)/income, net	0	0	0	0
Net losses recognized in interest expense	0	0	0	0
Total	0	0	0	0
Derivatives not designated as hedging instruments:
Net (losses)/gains recognized in other (expense)/income, net	4,794	157	(4,069)	(5,128)
Total amount recognized in statement of income	5,476	(1,672)	(1,491)	(14,112)
Interest Rate Contract [Member]
Cash flow hedges:
Net (losses)/gains recognized in other comprehensive loss (effective portion)	(2,341)	0	(2,341)	0
Net gains/(losses) reclassified from other comprehensive loss into earnings (effective portion):
Sales	0	0	0	0
Cost of products sold	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Other (expense)/income, net	0	0	0	0
Interest income/(expense)	(29)	0	(29)	0
Total	(29)	0	(29)	0
Fair value hedges:
Net (losses)/gains recognized in other (expense)/income, net	2,513	(12,008)	(10,610)	(10,327)
Net losses recognized in interest expense	0	(351)	0	(351)
Total	2,513	(12,359)	(10,610)	(10,678)
Derivatives not designated as hedging instruments:
Net (losses)/gains recognized in other (expense)/income, net	0	0	0	0
Total amount recognized in statement of income	2,484	(12,359)	(10,639)	(10,678)
Cross Currency Interest Rate Contract [Member]
Cash flow hedges:
Net (losses)/gains recognized in other comprehensive loss (effective portion)	9,300	10,682	27,629	20,537
Net gains/(losses) reclassified from other comprehensive loss into earnings (effective portion):
Sales	0	0	0	0
Cost of products sold	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Other (expense)/income, net	9,398	12,036	29,662	24,036
Interest income/(expense)	(1,437)	(829)	(2,943)	(1,720)
Total	7,961	11,207	26,719	22,316
Fair value hedges:
Net (losses)/gains recognized in other (expense)/income, net	0	0	0	0
Net losses recognized in interest expense	0	0	0	0
Total	0	0	0	0
Derivatives not designated as hedging instruments:
Net (losses)/gains recognized in other (expense)/income, net	0	0	0	0
Total amount recognized in statement of income	$ 7,961	$ 11,207	$ 26,719	$ 22,316