Restructuring and Asset Related Charges - 2021 Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	$ 100	$ 70
2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Asset Retirement Obligation	6
Payments for Restructuring	(7)
Asset write-offs and adjustments	(13)
Restructuring Reserve	69		$ 0
Restructuring and Asset related charges, net	89
Minimum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	130
Future Cash Payments	80
Maximum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	170
Future Cash Payments	100
Severance and Related Benefit Costs | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring	(1)
Asset write-offs and adjustments	0
Restructuring Reserve	38		0
Restructuring and Asset related charges, net	39
Severance and Related Benefit Costs | Minimum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40
Severance and Related Benefit Costs | Maximum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	50
Asset Related Charges [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring	0
Asset write-offs and adjustments	(13)
Restructuring Reserve	0		0
Restructuring and Asset related charges, net	13
Asset Related Charges [Member] | Minimum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40
Asset Related Charges [Member] | Maximum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	60
Asset Retirement Obligation Costs [Member] | Minimum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	10
Asset Retirement Obligation Costs [Member] | Maximum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	15
Contract Termination | Minimum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	40
Contract Termination | Maximum [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	45
Costs Associated with Exit and Disposal Activities | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring	(6)
Asset write-offs and adjustments	0
Restructuring Reserve	31		$ 0
Restructuring and Asset related charges, net	37
Seed [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	14
Crop Protection [Member] | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	28
Corporate Segment | 2021 Restructuring Actions [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset related charges, net	$ 47