Accounting Policies (Details 3) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2015 USD ($) shares	Sep. 28, 2014 USD ($)	Sep. 27, 2015 USD ($) item $ / shares shares	Sep. 28, 2014 USD ($) $ / shares shares	Dec. 31, 2014
Shipping and Handling
Shipping and handling costs included in selling, general and administrative expense | $	$ 12.9	$ 15.8	$ 41.1	$ 46.3
Research and Development
Research and development costs included in selling, general, and administrative expense | $	$ 5.6	$ 5.3	$ 18.3	$ 17.2
Second Amended and Restated 2004 Stock Incentive Plan
Stock-based compensation
Number of stock incentive plans | item			1
Second Amended and Restated 2004 Stock Incentive Plan | Stock options
Stock-based compensation
Vesting period			4 years		3 years
Percentage of stock options becoming exercisable			25.00%		0.33%
Expiration period			10 years
Options granted (in shares)			0	114,211
Second Amended and Restated 2004 Stock Incentive Plan | Stock options | Class A
Stock-based compensation
Minimum exercise price as percentage of fair market value of common stock on grant date			100.00%
Second Amended and Restated 2004 Stock Incentive Plan | Restricted stock
Stock-based compensation
Granted (in shares)			174,575	150,577
Second Amended and Restated 2004 Stock Incentive Plan | Deferred shares
Stock-based compensation
Vesting rate per year for maximum vesting period			0.33		0.50
Second Amended and Restated 2004 Stock Incentive Plan | Deferred shares | Maximum
Stock-based compensation
Vesting period			3 years		2 years
Second Amended and Restated 2004 Stock Incentive Plan | Performance stock units
Stock-based compensation
Granted (in shares)			631	117,619
Second Amended and Restated 2004 Stock Incentive Plan | Performance stock units | Minimum
Stock-based compensation
Number of common shares for each unit of award held			0
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)			59,995	30,561
Fair value assumptions
Expected life			3 years	3 years
Expected stock price volatility (as a percent)			23.40%	31.20%
Expected dividend yield (as a percent)			1.20%	0.90%
Risk-free interest rate (as a percent)			1.10%	0.70%
Weighted average grant-date fair value (in dollars per share) | $ / shares			$ 19.04	$ 22.57
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%
Increased exercise price as percentage of fair market value of common stock on grant date in next fiscal year			80.00%