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Restructuring and Other Charges (Income) - Rollforward of Restructuring Reserves (Details)
$ in Millions
9 Months Ended
Sep. 30, 2021
USD ($)
Restructuring Reserve [Roll Forward]  
Restructuring reserve, beginning balance $ 16.4
Changes in reserves 17.8
Cash payments (19.9)
Restructuring reserve, ending balance 14.3
Asset retirement obligation 2.0
DuPont Crop restructuring  
Restructuring Reserve [Roll Forward]  
Restructuring reserve, beginning balance 13.6
Changes in reserves 4.9
Cash payments (8.1)
Restructuring reserve, ending balance 10.4
Regional Realignment  
Restructuring Reserve [Roll Forward]  
Restructuring reserve, beginning balance 0.0
Changes in reserves 8.7
Cash payments (6.3)
Restructuring reserve, ending balance 2.4
Other workforce related and facility shutdowns  
Restructuring Reserve [Roll Forward]  
Restructuring reserve, beginning balance 2.8
Changes in reserves 4.2
Cash payments (5.5)
Restructuring reserve, ending balance $ 1.5