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Commitments and Contingent Liabilities Corteva Separation (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
PFAS [Member] | Minimum [Member]      
Loss Contingencies [Line Items]      
Corteva and DuPont stray liability threshold for PFAS $ 1    
De minimis threshold 1,000,000    
DuPont de Nemours and Dow [Member] | Accounts and Notes Receivable [Member]      
Loss Contingencies [Line Items]      
Indemnification Assets 112,000,000 $ 47,000,000 $ 36,000,000
DuPont de Nemours and Dow [Member] | Other Assets [Member]      
Loss Contingencies [Line Items]      
Indemnification Assets 263,000,000 143,000,000 129,000,000
DuPont de Nemours and Dow [Member] | Accrued and Other Current Liabilities [Member]      
Loss Contingencies [Line Items]      
Indemnified Liabilities 17,000,000 9,000,000 19,000,000
DuPont de Nemours and Dow [Member] | Other noncurrent obligations      
Loss Contingencies [Line Items]      
Indemnified Liabilities $ 145,000,000 $ 149,000,000 $ 141,000,000
Corteva [Member]      
Loss Contingencies [Line Items]      
Stray liability sharing percentage 29.00%    
Corteva [Member] | PFAS [Member]      
Loss Contingencies [Line Items]      
Stray liability sharing percentage for PFAS 50.00%    
DuPont de Nemours [Member]      
Loss Contingencies [Line Items]      
Stray liability sharing percentage 71.00%    
DuPont de Nemours [Member] | PFAS [Member]      
Loss Contingencies [Line Items]      
Stray liability sharing percentage for PFAS 50.00%    
Corteva and DuPont | PFAS [Member]      
Loss Contingencies [Line Items]      
Stray liability sharing percentage for PFAS 50.00%    
Amount credited to each company's threshold $ 150,000,000    
Corteva and DuPont | PFAS [Member] | Maximum [Member]      
Loss Contingencies [Line Items]      
Corteva and Dupont stray liability threshold for PFAS 300,000,000    
DuPont de Nemours and Corteva      
Loss Contingencies [Line Items]      
Corteva and DuPont stray liability threshold for PFAS $ 200,000,000