Stock Plans (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013	Dec. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Former Stock-based Compensation Plans			1
Total income tax benefit recognized for stock-based compensation	$ 1,800,000	$ 1,000,000	$ 3,500,000	$ 2,400,000
Stock-based compensation costs capitalized as part of inventory			400,000	300,000
Options related excess tax benefit, classified as a financing cash activity			0	0
Total pre-tax stock-based compensation expense	4,803,000	3,226,000	9,319,000	7,642,000
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			31,854	89,521
Weighted-average grant-date fair value of stock granted (per share)			$ 39.17	$ 30.51
Shares available for grant under employee stock purchase plan	1,100,000		1,100,000
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted			2,373	3,263
Weighted-average grant-date fair value of stock granted (per share)			$ 42.14	$ 30.65
Total pre-tax stock-based compensation expense	700,000			700,000
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted			79,463	98,056
Weighted-average grant-date fair value of stock granted (per share)			$ 42.84	$ 34.06
Total pre-tax stock-based compensation expense	700,000	0	1,700,000	900,000
Awards/units outstanding	271,679		271,679
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent	4,400,000		4,400,000
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted			235,000
Weighted-average grant-date fair value of stock granted (per share)	$ 43.19	$ 32.34	$ 42.61	$ 33.70
Fair value of restricted stock awards vested	200,000	300,000	7,000,000	7,200,000
Total pre-tax stock-based compensation expense	1,900,000	1,700,000	3,900,000	3,900,000
Awards/units outstanding	592,000		592,000		649,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	14,000,000		14,000,000
Weighted-average period for recognition of unrecognized compensation cost, years			1 year 7 months
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of options	$ 11.80	$ 9.82	$ 11.84	$ 10.82
Total intrinsic value of options exercised	11,100,000	1,000,000	17,600,000	4,100,000
Cash received from option exercises			19,500,000	7,300,000
Total pre-tax stock-based compensation expense	1,400,000	800,000	2,900,000	2,100,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	$ 8,700,000		$ 8,700,000
Weighted-average period for recognition of unrecognized compensation cost, years			2 years 1 month
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