Accounting Policies (Details 3) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014 item	Sep. 29, 2013
Stock-based compensation
Number of stock incentive plans			1
Shipping and Handling
Shipping and handling costs included in selling, general and administrative expense	$ 15.8	$ 15.9	$ 46.3	$ 45.6
Research and Development
Research and development costs included in selling, general, and administrative expense	$ 5.3	$ 5.2	$ 17.2	$ 16.1
Nonqualified stock options | Class A
Stock-based compensation
Minimum exercise price as percentage of fair market value of common stock on grant date			100.00%
2004 Stock Incentive Plan | Stock options
Stock-based compensation
Vesting period			4 years
Percentage of stock awards becoming exercisable			25.00%
Expiration period			10 years
Awards issued during the period (in shares)				349,867
Fair value assumptions
Expected life			6 years	6 years
Expected stock price volatility (as a percent)			37.50%	40.30%
Expected dividend yield (as a percent)			1.00%	1.00%
Risk-free interest rate (as a percent)			1.90%	1.70%
Weighted average grant-date fair value (in dollars per share)			$ 20.04	$ 20.30
2004 Stock Incentive Plan | Stock options | Granted in 2014
Stock-based compensation
Vesting period			3 years
Percentage of stock awards becoming exercisable			33.00%
Awards issued during the period (in shares)			114,211
2004 Stock Incentive Plan | Restricted stock
Stock-based compensation
Vesting period			3 years
Percentage of stock awards becoming exercisable			33.00%
Awards issued during the period (in shares)				131,510
2004 Stock Incentive Plan | Restricted stock | Granted in 2014
Stock-based compensation
Vesting period			2 years
Percentage of stock awards becoming exercisable			50.00%
Awards issued during the period (in shares)			150,577
2004 Stock Incentive Plan | Performance stock units
Stock-based compensation
Vesting period			3 years
Performance period of revenue to measure compound annual growth rate			3 years
Awards issued during the period (in shares)			117,619
2004 Stock Incentive Plan | Performance stock units | Class A | Minimum
Stock-based compensation
Percentage of target number of shares that may be earned by recipient			0.00%
2004 Stock Incentive Plan | Performance stock units | Class A | Maximum
Stock-based compensation
Percentage of target number of shares that may be earned by recipient			200.00%
2004 Stock Incentive Plan | Deferred shares
Stock-based compensation
Vesting period			3 years
Vesting rate per year for maximum vesting period			0.33
2004 Stock Incentive Plan | Deferred shares | Granted in 2014
Stock-based compensation
Vesting period			2 years
Percentage of stock awards becoming exercisable			50.00%
Management Stock Purchase Plan | Class A
Stock-based compensation
Shares authorized	2,000,000		2,000,000
Management Stock Purchase Plan | Restricted stock units (RSUs)
Stock-based compensation
Granted (in shares)			30,561	44,777
Fair value assumptions
Expected life			3 years	3 years
Expected stock price volatility (as a percent)			31.20%	34.10%
Expected dividend yield (as a percent)			0.90%	0.90%
Risk-free interest rate (as a percent)			0.70%	0.40%
Weighted average grant-date fair value (in dollars per share)			$ 22.57	$ 18.05
Management Stock Purchase Plan | Restricted stock units (RSUs) | Minimum
Stock-based compensation
Vesting period			3 years
Management Stock Purchase Plan | Restricted stock units (RSUs) | Maximum
Stock-based compensation
Vesting period			3 years
Management Stock Purchase Plan | Restricted stock units (RSUs) | Class A
Stock-based compensation
Number of common shares for each unit of award held			1
Exercise price as percentage of fair market value of common stock on grant date			67.00%