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Inventory
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventory
6.    Inventory
The following table presents the components of inventory:
(in millions)
March 31, 2021
December 31, 2020
Merchandise inventory$480.4 $463.0 
Finished goods112.6 115.9 
Raw materials142.8 123.2 
Work in process41.9 37.5 
Total$777.7 $739.6