Common Stock Plans (2004 Stock Appreciation Rights Plan) (Details) (Stock Appreciation Rights, 2004 Stock Appreciation Rights Plan, USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended						12 Months Ended
	Jan. 26, 2011	Jan. 27, 2010	Feb. 16, 2009	Jan. 28, 2009	Feb. 04, 2008	Feb. 01, 2007	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Appreciation Rights | 2004 Stock Appreciation Rights Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from Stock Options Exercised							$ 1.0
Share-based compensation expense								$ 4.3	$ 3.4
Remaining requisite service period (in years)							3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning of Period, Shares							777,218	656,340	503,215
Granted								189,984	171,749
Exercised/forfeited							(124,188)	(69,106)	(18,624)
Outstanding, End of Period, Shares							653,030	777,218	656,340
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, Beginning of Period, Weighted Average Exercise Price							$ 42.00	$ 38.30	$ 35.46
Granted								$ 54.99	$ 46.69
Exercised/forfeited							$ 30.90	$ 41.21	$ 37.65
Outstanding, End of Period, Weighted Average Exercise Price							$ 44.14	$ 42.00	$ 38.30
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Awards granted	189,984	171,749	3,292	305,257	67,093,000	85,906,000
Fair market value of stock option at grant	$ 11.19	$ 11.93	$ 17.57	$ 18.46	$ 5.80	$ 9.25
Expected life of award	4 years 7 months 6 days	3 years 7 months 6 days	3 years	3 years	2 years 7 months 6 days	2 years
Risk-free interest rate	0.63%	0.44%	0.37%	0.37%	0.31%	0.26%
Annualized volatility rate	40.40%	40.40%	40.40%	40.40%	40.40%	40.40%
Dividend yield	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%