Restructuring And Other Charges (Additional Information) (Detail) (USD $)	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 26, 2014 August Fiscal 2014 Restructuring Plan	Apr. 26, 2014 August Fiscal 2014 Restructuring Plan positions	Apr. 27, 2013 Fiscal 2011 Plans	Apr. 27, 2013 Fiscal 2011 Plans	Jul. 27, 2013 Fiscal 2011 Plans	Apr. 26, 2014 Fiscal 2011 Plans
Restructuring Cost and Reserve [Line Items]
Expected Number of Positions Eliminated (headcounts)		4,000
Restructuring, position eliminated of total positions, percent		5.00%
Restructuring Charges	$ 26,000,000	$ 336,000,000	$ 33,000,000	$ 105,000,000
Restructuring and Related Cost, Expected Cost		500,000,000
Restructuring and Related Cost, Cost Incurred to Date					1,100,000,000
Restructuring Reserve	$ 25,000,000	$ 25,000,000				$ 4,000,000