Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Sep. 27, 2015	Dec. 28, 2014
Allowance for trade accounts receivables	$ 9.7	$ 10.7
Class A Common Stock
Capital stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares issued (in shares)	36.6	36.6
Treasury stock, common stock (in shares)	2.2	2.4
Class B Common Stock
Capital stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares issued (in shares)	3.5	3.5