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Property, Plant and Equipment (Schedule of Property, Plant and Equipment) (Details) - USD ($)
$ in Millions
Mar. 26, 2021
Dec. 25, 2020
Property, Plant and Equipment    
Property, plant and equipment, gross $ 1,874.2 $ 1,910.9
Less: accumulated depreciation (1,079.8) (1,077.8)
Property, plant and equipment, net $ 794.4 $ 833.1