Restructuring and Asset Related Charges Execute to Win Productivity Program (Details) - USD ($) $ in Millions	3 Months Ended		15 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	$ 100	$ 70
Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	56
Payments for Restructuring	(14)
Asset write-offs and adjustments	(4)
Asset Retirement Obligation	20		$ 20
Restructuring Reserve, Ending Balance	42		42
Restructuring and Asset related charges, net	4	63
Restructuring and Asset Related Charges - Net			180
2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0
Payments for Restructuring	7
Asset write-offs and adjustments	(13)
Asset Retirement Obligation	6		6
Restructuring Reserve, Ending Balance	69		69
Restructuring and Asset related charges, net	89
Severance and Related Benefit Costs | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	53
Payments for Restructuring	(11)
Asset write-offs and adjustments	0
Restructuring Reserve, Ending Balance	42		42
Restructuring and Asset related charges, net	0	42
Restructuring and Asset Related Charges - Net			63
Severance and Related Benefit Costs | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0
Payments for Restructuring	1
Asset write-offs and adjustments	0
Restructuring Reserve, Ending Balance	38		38
Restructuring and Asset related charges, net	39
Costs Associated with Exit and Disposal Activities | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0
Payments for Restructuring	6
Asset write-offs and adjustments	0
Restructuring Reserve, Ending Balance	31		31
Restructuring and Asset related charges, net	37
Asset Related Charges [Member] | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	3
Payments for Restructuring	(3)
Asset write-offs and adjustments	(4)
Restructuring Reserve, Ending Balance	0		0
Restructuring and Asset related charges, net	4	21
Restructuring and Asset Related Charges - Net			117
Asset Related Charges [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance	0
Payments for Restructuring	0
Asset write-offs and adjustments	(13)
Restructuring Reserve, Ending Balance	0		0
Restructuring and Asset related charges, net	13
Seed [Member] | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	0	3
Seed [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	14
Crop Protection [Member] | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	4	18
Crop Protection [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	28
Corporate | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	$ 0	$ 42
Minimum [Member] | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Ceased Operations	12 months
Minimum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 130		130
Minimum [Member] | Severance and Related Benefit Costs | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40		40
Minimum [Member] | Asset Related Charges [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40		40
Minimum [Member] | Asset Retirement Obligation Costs [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 10		10
Maximum [Member] | Execute to Win Productivity Program [Domain]
Restructuring Cost and Reserve [Line Items]
Ceased Operations	24 months
Maximum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 170		170
Maximum [Member] | Severance and Related Benefit Costs | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	50		50
Maximum [Member] | Asset Related Charges [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	60		60
Maximum [Member] | Asset Retirement Obligation Costs [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 15		$ 15