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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of restructuring charges, remediation cost, and asset impairment loss.

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Restructuring and Asset Related Charges DowDuPont Cost Synergy Program (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		22 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	$ 60	$ 101	$ 121	$ 231
DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			215
Restructuring and Asset Related Charges - Net	60	101	122	231	$ 874
Payments for Restructuring			(140)
Asset write-offs and adjustments			(38)
Restructuring Reserve, Ending Balance	159		159		159
Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			154
Restructuring and Asset Related Charges - Net	0	64	14	137	340
Payments for Restructuring			(60)
Asset write-offs and adjustments			0
Restructuring Reserve, Ending Balance	108		108		108
Contract Termination Charges \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			61
Restructuring and Asset Related Charges - Net	49	23	69	37	193
Payments for Restructuring			(79)
Asset write-offs and adjustments			0
Restructuring Reserve, Ending Balance	51		51		51
Asset Related Charges [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			0
Restructuring and Asset Related Charges - Net	11	14	39	57	341
Payments for Restructuring			(1)
Asset write-offs and adjustments			(38)
Restructuring Reserve, Ending Balance	0		0		$ 0
Seed [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	(49)	(37)	(76)	(83)
Seed [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	49	37	73	83
Crop Protection [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	(2)		(25)	(12)
Crop Protection [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	2	0	29	12
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	(9)	(64)	(20)	(136)
Corporate \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	$ 9	$ 64	$ 20	$ 136