Earnings Per Share - Schedule of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic and diluted loss from continuing operations:
Net loss attributable to Venator Materials PLC ordinary shareholders, Basic	$ 93	$ (23)	$ 90	$ (44)
Net loss attributable to Venator Materials PLC ordinary shareholders, Diluted	$ 93	$ (23)	$ 90	$ (44)
Denominator:
Weighted average shares outstanding, basic (in shares)	107.9	107.3	107.8	107.2
Weighted average shares outstanding, diluted (in shares)	107.9	107.3	107.8	107.2
Potential dilutive impact of share-based awards (in shares)	0.0	0.8	0.0	0.5

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) from continuing operations available to common shareholders.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) from continuing operations available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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