Common Stock Plans (Stock Options) (Details) (Stock Incentive Plan, USD $)	0 Months Ended			12 Months Ended
	Jan. 25, 2012	Jan. 26, 2011	Jan. 27, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Remaining reserved for issuance				3,418,881
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, vesting period				3 years
Share-based compensation, expiration period				10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning of Period, Shares				1,338,241	1,276,043	1,107,809
Outstanding, Beginning of Period, Weighted Average Exercise Price				$ 44.77	$ 40.16	$ 36.83
Granted, Shares	371,040	293,978	281,110	371,040	293,978	281,110
Granted				$ 54.11	$ 54.99	$ 46.69
Exercised, Shares				(58,471)	(227,405)	(111,676)
Exercised, Weighted Average Exercise Price				$ 24.55	$ 32.33	$ 23.83
Forfeited, Shares				(2,335)	(4,375)	(1,200)
Forfeited, Weighted Average Exercise Price				$ 46.45	$ 35.35	$ 13.72
Outstanding, End of Period, Shares				1,648,475	1,338,241	1,276,043
Outstanding, End of Period, Weighted Average Exercise Price				$ 47.58	$ 44.77	$ 40.16
Exercisable, Shares				987,733	677,753	574,992
Exercisable, Weighted Average Exercise Price				$ 43.75	$ 43.72	$ 41.16
Remaining reserved for issuance				3,418,881