Selected Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 464	$ 526	$ 578	$ 562	$ 484	$ 533	$ 626	$ 622	$ 2,130	$ 2,265	$ 2,209
Cost of goods sold	431	464	511	486	440	463	193	454	1,892	1,550	1,744
Restructuring, impairment and plant closing and transition costs	9	12	0	12	55	428	136	9	33	628	52
Income (loss) from continuing operations					(69)	(366)	198	80	(170)	(157)	136
Net (loss) income	(173)	(17)	22	(2)	(69)	(366)	198	80	(170)	(157)	144
Net (loss) income attributable to Venator	$ (174)	$ (19)	$ 21	$ (3)	$ (69)	$ (368)	$ 196	$ 78	$ (175)	$ (163)	$ 134
Basic (loss) income per share:
Net (loss) income attributable to Venator Materials PLC ordinary shareholders (USD per share)	$ (1.63)	$ (0.18)	$ 0.20	$ (0.03)	$ (0.65)	$ (3.46)	$ 1.84	$ 0.73	$ (1.64)	$ (1.53)	$ 1.26
Diluted (loss) income per share:
Net (loss) income attributable to Venator Materials PLC ordinary shareholders (USD per share)	$ (1.63)	$ (0.18)	$ 0.20	$ (0.03)	$ (0.65)	$ (3.46)	$ 1.84	$ 0.73	$ (1.64)	$ (1.53)	$ 1.26