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Fair Value Measurements - Recurring (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 26, 2020
Jun. 28, 2019
Dec. 27, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Price Risk Derivative Liabilities, at Fair Value $ 3.1   $ 0.0
Proceeds from sales of property, plant and equipment 2.2 $ 28.0  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign currency forward contracts, net (liability) asset 0.0   0.0
Price Risk Derivative Liabilities, at Fair Value 0.0   0.0
Interest rate contracts, net liability 0.0   0.0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign currency forward contracts, net (liability) asset (0.8)   1.0
Price Risk Derivative Liabilities, at Fair Value (3.8)   0.0
Interest rate contracts, net liability (56.7)   (30.3)
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign currency forward contracts, net (liability) asset 0.0   0.0
Price Risk Derivative Liabilities, at Fair Value 0.0   0.0
Interest rate contracts, net liability $ 0.0   $ 0.0