Stock Plans (Weighted-Average Assumptions Used in the Black-Scholes Option Pricing Model) (Details)	3 Months Ended		9 Months Ended
	Oct. 02, 2011 years	Oct. 03, 2010 years	Oct. 02, 2011 years segments days	Oct. 03, 2010 years
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	1.90%	1.80%	1.90%	1.80%
Expected dividend yield	1.10%	1.40%	1.10%	1.40%
Expected lives, years	4	4	4	4
Expected stock volatility	38.10%	37.50%	38.10%	37.50%