Share-Based Compensation Plans (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Apr. 28, 2012
Nonvested Deferred Stock Units and Restricted Stock Shares
Unrecognized compensation cost
Unrecognized compensation cost	$ 18.6
Compensation recognition period (in years)	1 year 6 months
Deferred Stock Units
Shares
Balance at the beginning of the period (in shares)	539,749
Granted (in shares)	330,284
Vested (in shares)	(350,255)
Forfeited (in shares)	(4,784)
Balance at the end of the period (in shares)	514,994
Shares relinquished for tax withholding	109,335
Weighted-Average Grant-Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 28.10
Granted (in dollars per share)	$ 40.13
Vested (in dollars per share)	$ 27.68
Forfeited (in dollars per share)	$ 27.94
Balance at the end of the period (in dollars per share)	$ 36.10
Restricted Stock
Shares
Balance at the beginning of the period (in shares)	119,081
Granted (in shares)	4,578
Vested (in shares)	(19,360)
Balance at the end of the period (in shares)	104,299
Weighted-Average Grant-Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 28.45
Granted (in dollars per share)	$ 38.20
Vested (in dollars per share)	$ 27.77
Balance at the end of the period (in dollars per share)	$ 29.01
Employee Stock Purchase Plan (ESDP)
Employee Stock Discount Plan disclosures
Maximum number of common stock shares available for purchase in the plan	2,137,500
Purchase price percentage of fair market value	85.00%
Maximum shares allowable to purchase in each quarter by participants	125
Number of shares purchased	22,452
Weighted-average share price of shares purchased (in dollars per share)	$ 27.79
Shares reserved for issuance	930,650