Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 29, 2020	Dec. 29, 2019
Allowance for trade accounts receivables	$ 11.1	$ 12.9
Class A Common Stock
Capital stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	100.0	100.0
Common stock, shares issued (in shares)	36.6	36.6
Treasury stock, common stock (in shares)	0.8	1.0
Class B Common Stock
Capital stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	10.0	10.0
Common stock, shares issued (in shares)	3.5	3.5