Earnings (Losses) Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic and diluted (loss) income from continuing operations:
(Loss) income from continuing operations attributable to Venator Materials PLC ordinary shareholders									$ (175)	$ (163)	$ 126
Basic and diluted income from discontinued operations:
Income from discontinued operations attributable to Venator Materials PLC ordinary shareholders									0	0	8
Basic and diluted net (loss) income:
Net (loss) income attributable to Venator	$ (174)	$ (19)	$ 21	$ (3)	$ (69)	$ (368)	$ 196	$ 78	$ (175)	$ (163)	$ 134
Denominator:
Weighted average shares outstanding (shares)									106.5	106.4	106.3
Dilutive share-based awards (shares)									0.0	0.3	0.4
Total weighted average shares outstanding, including dilutive shares (shares)									106.5	106.7	106.7
Antidilutive securities (in shares)									2.0	1.0