Commitments and Contingent Liabilities Environmental (Details) $ in Millions	Mar. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 359	[1]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	630	[1]
Indemnification Assets	198
Chemours related obligation subject to indemnification [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	164	[1],[2],[3]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	289	[1]
Indemnification Assets	164
Discontinued Operations [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	91	[1],[2]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	223	[1]
Indemnification Assets	0
Environmental remediation liabilities primarily related to DuPont - subject to indemnity from DuPont [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	34	[1],[3]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	62	[1]
Indemnification Assets	34
Not subject to indemnification [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	70	[1]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	56	[1]
Indemnification Assets	0
DuPont de Nemours [Member] | DuPont de Nemours [Member]
Loss Contingencies [Line Items]
Stray liability threshold	200
Superfund Sites [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	51
Superfund Sites [Member] | Chemours [Member] | Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Indemnification Assets	$ 30

[1] Accrual balance represents management’s best estimate of the costs of remediation and restoration, although it is reasonably possible that the potential exposure, as indicated, could range above the amounts accrued, as there are inherent uncertainties in these estimates.

[2] Represents liabilities that are subject the $200 million thresholds and sharing arrangements as discussed on page 26, under Corteva Separation Agreement.

[3] The company has recorded an indemnification asset related to these accruals, including $30 million related to the Superfund sites.