Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended			12 Months Ended	3 Months Ended			12 Months Ended	3 Months Ended				12 Months Ended
	Oct. 28, 2011	Jul. 29, 2011	Apr. 29, 2011	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Positions	Oct. 28, 2011 Fiscal Year 2011 Initiative [Member] Positions	Oct. 28, 2011 Fiscal Year 2011 Initiative [Member] Employee Termination Costs [Member]	Jul. 29, 2011 Fiscal Year 2011 Initiative [Member] Employee Termination Costs [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Employee Termination Costs [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Employee Termination Costs [Member]	Oct. 28, 2011 Fiscal Year 2011 Initiative [Member] Asset Write-downs [Member]	Jul. 29, 2011 Fiscal Year 2011 Initiative [Member] Asset Write-downs [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Asset Write-downs [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Asset Write-downs [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Contract Termination [Member]	Oct. 28, 2011 Fiscal Year 2011 Initiative [Member] Other Restructuring [Member]	Jul. 29, 2011 Fiscal Year 2011 Initiative [Member] Other Restructuring [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Other Restructuring [Member]	Apr. 29, 2011 Fiscal Year 2011 Initiative [Member] Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Balance as of	$ 128	$ 204	$ 0			$ 94	$ 157		$ 0	$ 0	$ 0		$ 0		$ 34	$ 47		$ 0
Restructuring charges			257						162				24					71
Payments/Write-downs	(58)	(76)	(53)			(43)	(63)		(5)	0	0		(24)		(15)	(13)		(24)
Balance as of	70	128	204			51	94	157	157	0	0	0	0		19	34	47	47
Restructuring Charges				272				177				24		45			26
Incremental defined benefit pension and post-retirement related expenses				15
Inventory write-downs and production related asset impairments				11
Intangible asset impairment				$ 19
Expected number of positions eliminated				2,100
Number of positions eliminated					1,700