Amount of asset-related charges expected to be recognized for the specified restructuring plan.

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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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Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

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

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Restructuring and Asset Related Charges - Net (DowDuPont Cost Synergy Program) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Nov. 01, 2017
Scenario, Forecast [Member] \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 70
Successor
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	40
Successor \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Asset Related Charges - Net	40
Payments for Restructuring	(1)
Non-cash compensation	(7)
Restructuring Reserve	$ 32
Subsequent Event [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost			$ 850
Restructuring and Asset Related Charges - Net		$ 115
Minimum [Member] \| Subsequent Event [Member] \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost			350
Minimum [Member] \| Subsequent Event [Member] \| Contract Termination [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost			110
Maximum [Member] \| Subsequent Event [Member] \| Employee Severance [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost			400
Maximum [Member] \| Subsequent Event [Member] \| Asset Related Charges [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost, Asset Related			360
Maximum [Member] \| Subsequent Event [Member] \| Contract Termination [Member] \| DowDuPont Cost Synergy Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost			$ 140