Commitments and Contingent Liabilities Litigation - Leach and MDL Settlement (Details)	3 Months Ended	12 Months Ended		108 Months Ended
	Jun. 30, 2017 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2004 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2017 lawsuits	Jan. 01, 2012
PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Binding Settlement Agreement Class Size			80,000
Loss Contingency, Number Of Water Districts Receiving Water Treatment						6
Litigation Settlement, Liability For Medical Monitoring Program, Threshold			$ 235,000,000
Litigation Settlement, Medical Monitoring Program, Escrow Account, Disbursements To Date				$ 2,000,000
Escrow Balance		$ 1,000,000		$ 1,000,000
PFOA Matters: Multi-District Litigation [Member]
Loss Contingencies [Line Items]
Disease Categories for MDL		6		6
Lawsuits alleging personal injury filed | lawsuits					3,550
Litigation Settlement Amount	$ 670,700,000
DuPont de Nemours and Corteva Contribution to MDL Settlement [Member]
Loss Contingencies [Line Items]
Litigation Settlement Amount		$ 27,000,000
MDL Settlement [Member]
Loss Contingencies [Line Items]
Litigation Settlement Amount		83,000,000
Chemours Contribution to MDL Settlement [Member]
Loss Contingencies [Line Items]
Litigation Settlement Amount		$ 29,000,000
Post-MDL Settlement PFOA Personal Injury Claims [Domain] | PFOA Matters: Drinking Water Actions [Member] | Scheduled for Trial [Member]
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number		96		96
Post-MDL Settlement PFOA Personal Injury Claims [Domain] | PFOA Matters: Drinking Water Actions [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number		95		95
Post-MDL Settlement PFOA Personal Injury Claims [Domain] | Compensatory Damages [Member] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Litigation Settlement Amount		$ 40,000,000
Post-MDL Settlement PFOA Personal Injury Claims [Domain] | Loss of Consortium [Member] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Litigation Settlement Amount		10,000,000
Chemours [Member] | PFOA Matters [Member]
Loss Contingencies [Line Items]
Indemnification Assets for Liabilities Indemnified by Chemours		17,000,000		$ 17,000,000
Liability relating to testing drinking water in and around certain former EID sites and offering treatment or alternative supply of drinking water.		$ 21,000,000		$ 21,000,000
DuPont de Nemours [Member] | PFOA Matters: Multi-District Litigation [Member] | Corteva [Member]
Loss Contingencies [Line Items]
Litigation Settlement Amount	$ 335,000,000