Stock Plans (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011 years	Oct. 03, 2010	Jan. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total income tax benefit recognized for stock-based compensation	$ 300,000	$ 1,300,000	$ 3,000,000	$ 3,900,000
Stock-based compensation costs capitalized as part of inventory			400,000	300,000
Options related excess tax benefit, classified as a financing cash activity			9,303,000	82,000
Total pre-tax stock-based compensation expense	1,467,000	3,968,000	9,427,000	11,683,000
2009 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under plan	10,000,000		10,000,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under plan	5,000,000		5,000,000
Shares/units granted			36,592
Weighted-average grant-date fair value of stock granted (per share)			$ 25.57
Shares available for grant under employee stock purchase plan	1,300,000		1,300,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of options	$ 7.99	$ 5.52	$ 7.86	$ 5.99
Total intrinsic value of options exercised	50,000	500,000	6,900,000	3,000,000
Cash received from option exercises			23,700,000	15,200,000
Total pre-tax stock-based compensation expense	1,100,000	1,400,000	3,300,000	5,400,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	5,900,000		5,900,000
Weighted-average period for recognition of unrecognized compensation cost, years			1.9
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted			440,000
Weighted-average grant-date fair value of stock granted (per share)	$ 25.19	$ 20.88	$ 26.68	$ 21.20
Fair value of restricted stock awards vested	20,000	0	5,300,000	1,000,000
Total pre-tax stock-based compensation expense	1,600,000	1,400,000	4,600,000	3,800,000
Awards/units outstanding	715,000		715,000		578,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	10,900,000		10,900,000
Weighted-average period for recognition of unrecognized compensation cost, years			1.7
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted			89,828	129,879
Weighted-average grant-date fair value of stock granted (per share)			$ 26.71	$ 20.89
Total pre-tax stock-based compensation expense	(1,200,000)	1,100,000	800,000	1,700,000
Awards/units outstanding	346,308		346,308
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted			3,544	4,337
Weighted-average grant-date fair value of stock granted (per share)			$ 28.22	$ 23.06
Total pre-tax stock-based compensation expense	$ 0	$ 0	$ 800,000	$ 800,000