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Financial Instruments and Risk Management (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 27, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Sep. 27, 2019
Derivative [Line Items]              
Realized loss on interest rate swap   $ 0.4 $ 0.0 $ 0.5 $ 0.0    
Pretax gain (losses) on interest rate swap contracts   0.5 0.0 (3.7) 0.0    
Deferred income tax expense (benefit)   0.1 $ 0.0 (0.9) $ 0.0    
Interest Rate Swap              
Derivative [Line Items]              
Derivative amount   127.5   127.5     $ 150.0
Notional amount, quarterly reduction $ 7.5            
Prepaid expenses and other current assets              
Derivative [Line Items]              
Cash deposits related to commodity derivative contracts   $ 0.0   $ 0.0   $ 1.0