Stock-Based Awards (Details) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended					12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011	Jul. 26, 2013	Jul. 27, 2013 Stock Options	Jul. 27, 2013 Stock Options	Jul. 27, 2013 Restricted Share Units (RSUs)	Jul. 27, 2013 Restricted Share Units (RSUs)	Jul. 28, 2012 Restricted Share Units (RSUs)	Jul. 30, 2011 Restricted Share Units (RSUs)	Jul. 26, 2013 Restricted Share Units (RSUs)	Jul. 27, 2013 Performance Restricted Share Units	Jul. 27, 2013 Performance Restricted Share Units	Jul. 28, 2012 Performance Restricted Share Units	Jul. 30, 2011 Performance Restricted Share Units	Jul. 27, 2013 Long Term Incentive Plan, 2012	Nov. 20, 2012 Long Term Incentive Plan, 2012	Jul. 26, 2014 Scenario, Forecast Performance Restricted Share Units
Stock Options, Outstanding [Roll Forward]
Outstanding beginning period						3,298,747
Granted						144,155
Options Exercised						(544,162)
Forfeited or canceled						(129,608)
Outstanding ending period					2,769,132	2,769,132
Exercisable options beginning period					1,878,315	1,878,315
Stock Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding beginning period						$ 17.08
Granted						$ 18.47
Options Exercised						$ 9.65
Forfeited or canceled						$ 24.62
Outstanding ending period					$ 18.27	$ 18.27
Exercisable options beginning period					$ 20.33	$ 20.33
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding weighted average remaining contractual life	4 years 10 months 24 days
Exercisable weighted average remaining contractual life	3 years 8 months 12 days
Outstanding aggregate intrinsic value	$ 26,735,000
Exercisable aggregate intrinsic value	15,549,000
Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding [Roll Forward]
Outstanding beginning period								222,760					774,264
Granted								405,713					831,390
Share Units Vested								(91,413)					(137,432)
Forfeited or cancelled								(73,742)					(153,084)
Outstanding ending period							463,318.000	463,318.000	222,760			1,315,138.000	1,315,138.000	774,264
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding beginning period								$ 14.49					$ 18.76
Granted	$ 18.54							$ 18.52	$ 19.49	$ 13.60			$ 18.08	$ 19.47	$ 10.60
Share Units Vested								$ 12.79					$ 18.23
Forfeited or cancelled								$ 17.69					$ 18.36
Outstanding ending period							$ 17.78	$ 17.78	$ 14.49			$ 18.44	$ 18.44	$ 18.76
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]
Aggregate intrinsic value							12,269,000	12,269,000				34,825,000	34,825,000
Total number of shares available for grant																2,033,272	3,000,000
Shares available for grant																1,837,179
Options exercises and stock vesting	3,400,000	2,800,000	700,000
Unrecognized compensation expense related to stock options					5,200,000	5,200,000
Unrecognized compensation expense related to RSUs							6,800,000	6,800,000				8,800,000	8,800,000
Total compensation cost not yet recognized, period for recognition					2 years 0 months 0 days		3 years 1 month 24 days					1 year 2 months 12 days
Compensation expense												7,200,000	7,200,000
Share price				$ 26.48							$ 26.48
Total intrinsic value of stock options exercised	6,000,000	6,400,000	1,100,000
Cash from exercise of stock options	5,300,000	6,500,000	1,300,000
RSU settlement to common stock upon vesting								1
RSU vesting period						4 years		4 years					3 years
RSUs percentage of restricted vested shares								50.00%
Period of restriction for sale or transferability								90 days
RSU shares granted	294,000
Forfeited or cancelled																		265,000
RSUs outstanding												657,569
Total fair value of restricted share units vested								$ 4,200,000	$ 1,900,000	$ 1,100,000