Share-Based Compensation Plan (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($) employee shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax expense (benefit)	$ 150	$ (8)	$ 50
Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized number of shares to be granted under the stock incentive plan \| shares	12,800,000
Remaining shares available for grant \| shares	9,500,000
Vesting period	3 years
Number of employees were affected by the conversion \| employee	39
Number of converted award	1.33
Compensation cost from continuing operations	$ 7	6	3
Income tax expense (benefit)	(1)	(1)	(1)
Huntsman Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost from continuing operations	$ 0	$ 0	$ 2
Stock options \| Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term	10 years
Performance share units \| Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the number of employees affected in conversion of awards after separation.

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Ratio applied to the conversion of vested awards after separation.

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