Commitments and Contingent Liabilities Environmental (Details) $ in Millions	Mar. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Indemnification Asset	$ 186
Accrual for Environmental Loss Contingencies	333	[1],[2]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	577	[2]
Performance Chemicals
Loss Contingencies [Line Items]
Indemnified Liabilities for Liabilities Indemnified by Corteva	54
Chemours related obligation subject to indemnification [Member]
Loss Contingencies [Line Items]
Indemnification Asset	152	[3],[4]
Accrual for Environmental Loss Contingencies	152	[1],[2],[3],[4]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	280	[2],[3],[4]
Discontinued Operations [Member]
Loss Contingencies [Line Items]
Indemnification Asset	0	[3]
Other discontinued or divested business obligations [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	78	[1],[2],[3]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	177	[2],[3]
Environmental remediation liabilities primarily related to DuPont - subject to indemnity from DuPont [Member]
Loss Contingencies [Line Items]
Indemnification Asset	34	[4]
Accrual for Environmental Loss Contingencies	34	[1],[2],[4]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	65	[2],[4]
Not subject to indemnification [Member]
Loss Contingencies [Line Items]
Indemnification Asset	0
Accrual for Environmental Loss Contingencies	69	[1],[2]
Accrual for Environmental Loss Contingencies, Potential Exposure in Excess of Accrual	55	[2]
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	56
Superfund Sites [Member] | Chemours [Member] | Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Indemnification Asset	$ 30

[1] Accrual balance excludes indemnification liabilities of $54 million to Chemours, related to the cost sharing arrangement under the MOU (see page 10).

[2] 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

[3] Represents liabilities that are subject to the $200 million thresholds and sharing arrangements as discussed on page 22, under Corteva Separation Agreement.

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