Restructuring Charges (Details) (Fiscal Year 2012 Initiative, USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Jul. 27, 2012 Positions	Apr. 27, 2012 Positions	Apr. 27, 2012
Changes in Restructuring Reserves
Beginning balance	$ 91		$ 0
Restructuring charges			118
Payments/write-downs	(43)		(27)
Ending balance	48	91	91
Restructuring charge		118
Expected number of positions eliminated		1,000
Number of positions eliminated	500
Employee Termination Costs
Changes in Restructuring Reserves
Beginning balance	64		0
Restructuring charges			66
Payments/write-downs	(26)		(2)
Ending balance	38	64	64
Restructuring charge		66
Asset Write-downs
Changes in Restructuring Reserves
Beginning balance	0		0
Restructuring charges			9
Payments/write-downs	0		(9)
Ending balance	0	0	0
Restructuring charge		9
Contract Termination Costs
Changes in Restructuring Reserves
Restructuring charge		30
Other Related Cost
Changes in Restructuring Reserves
Beginning balance	27		0
Restructuring charges			43
Payments/write-downs	(17)		(16)
Ending balance	10	27	27
Restructuring charge		$ 13