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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Dec. 29, 2019
Dec. 30, 2018
Allowance for trade accounts receivable $ 12.9 $ 13.2
Class A common stock    
Common stock, par value (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized (in shares) 100,000,000 100,000,000.0
Common stock, shares issued (in shares) 36,600,000 36,600,000
Treasury stock, Class A shares (in shares) 1,000,000.0 1,200,000
Class B common stock    
Common stock, par value (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized (in shares) 10,000,000 10,000,000.0
Common stock, shares issued (in shares) 3,500,000 3,500,000