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Other Financial Information - Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Finished products $ 240.7 $ 201.0
Raw materials 229.4 155.7
Work in process 107.3 89.9
Total inventories $ 577.4 $ 446.6