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Commitments and Contingent Liabilities Other PFOA Matters / Fayetteville (Details)
 3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2025
USD ($)
Mar. 31, 2024
USD ($)
Jun. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
lawsuits
Aug. 03, 2025
USD ($)
Mar. 31, 2019
Corteva [Member]            
Loss Contingencies [Line Items]            
Stray liability sharing percentage       29.00%    
DuPont de Nemours [Member]            
Loss Contingencies [Line Items]            
Stray liability sharing percentage       71.00%    
NEW JERSEY | New Jersey Statewide Settlement [Member]            
Loss Contingencies [Line Items]            
New Jersey Statewide Settlement Reserve Fund $ 475,000,000          
NEW JERSEY | Chemours [Member]            
Loss Contingencies [Line Items]            
Purchase of Chemours' Future Interest in Insurance Proceeds         $ 150,000,000  
Litigation Settlement, Purchase of Chemours' Future Interest in Insurance Proceeds, Fee Threshold I         35,000,000  
Litigation Settlement, Purchase of Chemours' Future Interest in Insurance Proceeds, Fee Threshold II         $ 3,000,000  
Purchase of Chemours' Future Interest in Insurance Proceeds, Fee Interest Rate         2.00%  
NEW JERSEY | Corteva [Member] | Chemours [Member]            
Loss Contingencies [Line Items]            
Purchase of Chemours' Future Interest in Insurance Proceeds         $ 44,000,000  
NEW JERSEY | DuPont de Nemours [Member] | Chemours [Member]            
Loss Contingencies [Line Items]            
Purchase of Chemours' Future Interest in Insurance Proceeds         $ 106,000,000  
NEW JERSEY | New Jersey Statewide Settlement [Member]            
Loss Contingencies [Line Items]            
Loss Contingency, Pending Claims, Number           4
Litigation Settlement, Amount Awarded to Other Party $ 875,000,000          
Litigation Settlement, Amount Awarded to Other Party, Period 25 years          
Litigation Settlement, Amount Awarded to Other Party, Present value $ 500,000,000          
Litigation Settlement, Amount Awarded to Other Party, Discount Rate 8.00%          
Litigation Settlement, Amount Allocated to Statewide NRD $ 16,000,000          
Litigation Settlement, Percentage of Allocated Statewide NRD for Alleged Statewide AFFF Contamination 25.00%   25.00%      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax $ 72,000,000          
Discontinued Operation, Income (Loss) from Discontinued Operation, after Income Tax $ 58,000,000          
NEW JERSEY | New Jersey Statewide Settlement [Member] | DuPont de Nemours [Member]            
Loss Contingencies [Line Items]            
Historical DuPont Operating Sites 4          
NEW JERSEY | PFAS [Member] | New Jersey Statewide Settlement [Member]            
Loss Contingencies [Line Items]            
Loss Contingency, Pending Claims, Number           2
OHIO | PFOA Matters: Drinking Water Actions [Member]            
Loss Contingencies [Line Items]            
Loss Contingency, Pending Claims, Number | lawsuits       2    
Litigation Settlement, Amount Awarded to Other Party   $ 110,000,000        
OHIO | Corteva Contribution to Ohio NRD Settlement | PFOA Matters: Drinking Water Actions [Member]            
Loss Contingencies [Line Items]            
Litigation Settlement, Amount Awarded to Other Party     $ 16,000,000      
NEW YORK | Baker Class Action [Member]            
Loss Contingencies [Line Items]            
Litigation Settlement, Amount Awarded to Other Party $ 22,000,000          
Litigation Settlement, Amount Awarded to Other Party, Supplemental Payment $ 1,000,000          
Period for supplemental payment 5 years          
New Jersey & New York [Member] | PFAS [Member]            
Loss Contingencies [Line Items]            
Loss Contingency, Pending Claims, Number | lawsuits       2    
DELAWARE | Natural Resources Damages [Member] | Corteva [Member] | DuPont de Nemours [Member]            
Loss Contingencies [Line Items]            
Period for supplemental payment       8 years    
Threshold for payments to fund the NRST Trust       $ 50,000,000    
Supplemental payment threshold       $ 25,000,000    
NORTH CAROLINA | PFOA Matters: Drinking Water Actions [Member]            
Loss Contingencies [Line Items]            
Loss Contingency, Number of Property Owners       2,400