Pension Plans and Other Post Employment Benefit Plans Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	5 Months Ended	12 Months Ended
	Nov. 30, 2017	Sep. 30, 2018	Jun. 01, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2021
Defined Benefit and Contribution Disclosures [Line Items]
Defined Benefit Plan, Unfunded Status of Plan			$ 5,800
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses				$ 207	$ 202	$ 216
Trust Asset			319
U.S. Retirement Savings Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer Matching Contribution, Percent of Match				100.00%
Employer Matching Contribution, Percent of Employees' Gross Pay				6.00%
Employer Discretionary Contribution Percent				3.00%
Defined Contribution Plan, Employer Contribution				$ 94	142	183
Employers Discretionary Contribution, Vesting Period				3 years
Corteva Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution				$ 33	46	$ 82
Pension Plan
Defined Benefit and Contribution Disclosures [Line Items]
Defined Benefit Plan, Unfunded Status of Plan				(3,847)	(4,063)
Employer contributions				$ 62	$ 121
Expected long-term rate of return on plan assets				6.25%	6.24%	6.19%
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021				$ 1,456
Principal U.S. Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions		$ 1,100
Other Post Employment Benefits Plan
Defined Benefit and Contribution Disclosures [Line Items]
Defined Benefit Plan, Unfunded Status of Plan				(1,571)	$ (2,591)
Employer contributions				207	202
Expected Future Employer Contributions, Next Fiscal Year							$ 217
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021				140
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment				(939)
Other Pension Plan [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Employer contributions				62	121	$ 214
Expected Future Employer Contributions, Next Fiscal Year							$ 47
Nonqualified Plan [Member] | Trust Agreement [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Contributions to Trust	$ 571
Trust Asset Distribution			$ 39	65	62
Trust Asset				$ 347	409
Discontinued Operations [Member] | Corteva Other Contribution Plans [Member]
Defined Benefit and Contribution Disclosures [Line Items]
Defined Contribution Plan, Employer Contribution					$ 73	$ 148