Derivative Financial Instruments and Hedging Activities 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 25, 2012	Jan. 26, 2011	Jan. 25, 2012	Jan. 26, 2011
Foreign Exchange Contract [Member]
Cash flow hedges:
Net (losses)/gains recognized in other comprehensive loss (effective portion)	$ 13,634	$ 10,091	$ 31,965	$ 3,064
Net gains/(losses) reclassified from other comprehensive loss into earnings (effective portion):
Sales	1,456	1,361	5,549	2,037
Cost of products sold	(4,419)	(5,491)	(14,223)	(14,679)
Selling, general and administrative expenses	(57)	(53)	48	(189)
Other income/(expense), net	12,875	21,825	20,878	21,477
Interest income/(expense)	33	33	214	45
Total	9,888	17,675	12,466	8,691
Fair value hedges:
Total			0	0
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	(1,846)	(998)	(5,915)	(6,126)
Total amount recognized in statement of income	8,042	16,677	6,551	2,565
Foreign Exchange Contract [Member] | Other Expense [Member]
Fair value hedges:
Total	0	0	0	0
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	(1,846)	(998)	(5,915)	(6,126)
Foreign Exchange Contract [Member] | Interest Income [Member]
Fair value hedges:
Total			0	0
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	0	0	0	0
Interest Rate Contract [Member]
Cash flow hedges:
Net (losses)/gains recognized in other comprehensive loss (effective portion)	0	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 income/(expense), net	0	0	0	0
Interest income/(expense)	(59)	0	(88)	0
Total	(59)	0	(88)	0
Fair value hedges:
Total			(14,723)	(35,885)
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	(739)	0	(739)	0
Total amount recognized in statement of income	(4,911)	(25,207)	(15,550)	(35,885)
Interest Rate Contract [Member] | Other Expense [Member]
Fair value hedges:
Total	(4,113)	(25,207)	(14,723)	(35,534)
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	0	0	0	0
Interest Rate Contract [Member] | Interest Income [Member]
Fair value hedges:
Total			0	(351)
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	(739)	0	(739)	0
Cross Currency Interest Rate Contract [Member]
Cash flow hedges:
Net (losses)/gains recognized in other comprehensive loss (effective portion)	(8,985)	(2,335)	18,644	18,202
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 income/(expense), net	(8,373)	571	21,289	24,607
Interest income/(expense)	(1,449)	(1,214)	(4,392)	(2,934)
Total	(9,822)	(643)	16,897	21,673
Fair value hedges:
Total			0	0
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	0	0	0	0
Total amount recognized in statement of income	(9,822)	(643)	16,897	21,673
Cross Currency Interest Rate Contract [Member] | Other Expense [Member]
Fair value hedges:
Total	0	0	0	0
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	0	0	0	0
Cross Currency Interest Rate Contract [Member] | Interest Income [Member]
Fair value hedges:
Total			0	0
Derivatives not designated as hedging instruments:
Derivative instruments not designated as hedging instruments, losses, net	$ 0	$ 0	$ 0	$ 0