Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic and diluted net income:
Net loss attributable to Venator Materials PLC ordinary shareholders	$ (42)	$ (19)	$ (54)	$ (1)
Denominator:
Weighted average shares outstanding (shares)	106.7	106.6	106.7	106.5
Dilutive share-based awards (shares)	0.0	0.0	0.0	0.0
Total weighted average shares outstanding, including dilutive shares (shares)	106.7	106.6	106.7	106.5
Stock Compensation Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computations of earnings per share (shares)	4.0	2.0	4.0	2.0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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) available to common shareholders.

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