Noncash activity affecting the restructuring reserve related to asset write-offs and adjustments.

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount expected to be recognized in earnings for the specified restructuring cost.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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- Definition

Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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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	1 Months Ended	3 Months Ended	9 Months Ended	13 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2018	Nov. 01, 2017
DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			$ 161
Restructuring Reserve, Ending Balance		$ 260	260	$ 260
Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			133
Restructuring Reserve, Ending Balance		221	221	221
Contract Termination Charges \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Beginning Balance			28
Restructuring Reserve, Ending Balance		39	39	39
Minimum [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 460
Minimum [Member] \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					350
Minimum [Member] \| Contract Termination Charges \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					110
Maximum [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					715
Maximum [Member] \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					400
Maximum [Member] \| Contract Termination Charges \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					140
Maximum [Member] \| Asset Related Charges [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 175
Successor [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	$ 40	182	370
Successor [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net		61	252	$ 439
Payments for Restructuring			(117)
Restructuring Reserve, Net Translation Adjustment			(2)
Asset write-offs and adjustments			(34)
Successor [Member] \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	$ 40	24	176
Payments for Restructuring			(86)
Restructuring Reserve, Net Translation Adjustment			(2)
Successor [Member] \| Contract Termination Charges \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net		9	42
Payments for Restructuring			(31)
Successor [Member] \| Asset Related Charges [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net		$ 28	34
Asset write-offs and adjustments			$ (34)