Accounting Policies - Stock-Based Compensation (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 02, 2016 USD ($) shares	Sep. 27, 2015 USD ($)	Oct. 02, 2016 USD ($) item $ / shares shares	Sep. 27, 2015 USD ($) $ / shares shares	Dec. 31, 2014
Shipping and Handling
Shipping and handling costs included in selling, general and administrative expense | $	$ 12.7	$ 12.9	$ 35.6	$ 41.1
Research and Development
Research and development costs included in selling, general, and administrative expense | $	$ 6.6	$ 5.6	$ 19.6	$ 18.3
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%		33.00%
Expiration period (years)			10 years
Options granted (in shares)			0	0
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)			134,775	174,575
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)			106,724	631
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)			88,882	59,995
Increased exercise price as percentage of fair market value of common stock on grant date in next fiscal year			80.00%
Fair value assumptions
Expected life (years)			3 years	3 years
Expected stock price volatility (as a percent)			24.80%	23.40%
Expected dividend yield (as a percent)			1.30%	1.20%
Risk-free interest rate (as a percent)			0.90%	1.10%
Weighted average grant-date fair value (in dollars per share) | $ / shares			$ 18.15	$ 19.04
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%