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Asset Impairment, Restructuring, and Other Special Charges (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Restructuring and Related Activities [Abstract]        
Severance $ 0.0 $ 144.4 $ 11.5 $ 154.2
Asset impairment (recovery) and other special charges 0.0 (43.0) 200.1 7.1
Total asset impairment, restructuring, and other special charges $ 0.0 $ 101.4 211.6 $ 161.3
Intangible asset impairment     108.1  
Inventory write-down     $ 435.1