CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Trade accounts receivable, allowance for doubtful accounts (in dollars)	$ 9.7	$ 9.7
Preferred Stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Class A common stock
Common Stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, shares authorized	80,000,000	80,000,000
Common Stock, votes per share (Number of votes)	1	1
Common Stock, issued shares	28,660,247	28,824,779
Common Stock, outstanding shares	28,660,247	28,824,779
Class B common stock
Common Stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, shares authorized	25,000,000	25,000,000
Common Stock, votes per share (Number of votes)	10	10
Common Stock, issued shares	6,489,290	6,489,290
Common Stock, outstanding shares	6,489,290	6,489,290