Restructuring and Asset Related Charges - 2021 Restructuring Activities (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021		Sep. 30, 2020	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net		$ 26	$ 49	$ 261		$ 298
2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		150		150
Asset Retirement Obligation		6		6
Payments for Restructuring				(40)
Asset write-offs and adjustments				(29)
Restructuring Reserve		58		58			$ 0
Restructuring and Asset related charges, net		17		127
Severance and Related Benefit Costs | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		65		65
Payments for Restructuring				(14)
Asset write-offs and adjustments				0
Restructuring Reserve		44		44			0
Restructuring and Asset related charges, net		9		58
Asset Related Charges [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		35		35
Payments for Restructuring	[1]			0
Asset write-offs and adjustments	[1]			(29)
Restructuring Reserve	[1]	0		0			0
Restructuring and Asset related charges, net		7		29	[1]
Asset Retirement Obligation Costs [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		10		10
Contract Termination | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		40		40
Restructuring and Asset related charges, net		1		40
Costs Associated with Exit and Disposal Activities | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring	[2]			(26)
Asset write-offs and adjustments	[2]			0
Restructuring Reserve	[2]	14		14			$ 0
Restructuring and Asset related charges, net	[2]			40
Seed [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net		4		21
Crop Protection [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net		4		41
Corporate Segment | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net		$ 9		$ 65

[1] In addition, the company has a liability recorded for asset retirement obligations of $6 million as of September 30, 2021.

[2] The liability for contract terminations includes lease obligations. The cash impact of these obligations will be substantially complete by 2022