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Inventories (Tables)
3 Months Ended
Mar. 29, 2020
Inventory Disclosure [Abstract]  
Inventories
Balance at
Inventories (in millions):March 29, 2020December 29, 2019
Raw materials and supplies$252.5  $231.2  
Work in process88.8  108.3  
Finished goods67.3  61.7  
408.6  401.2  
Reduction to LIFO cost basis(7.5) (7.8) 
Total inventories, net$401.1  $393.4