Investment in TiO2 Manufacturing Joint Venture and Other Assets - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Assets Non Current [Line Items]
Percentage owned manufacturing joint venture under equity method investment		50.00%
Operating lease expense		$ 8,200,000	$ 15,000,000	$ 16,000,000	$ 14,000,000
Operating lease, right-of-use asset		1,600,000
Operating lease, liability		$ 1,600,000
Weighted average remaining lease term		14 years
Weighted average discount rate associated with leases		4.60%
Operating lease liability		$ 28,400,000
Operating lease not yet commenced, description		At December 31, 2019, we have no significant lease commitments that have not yet commenced.
Future minimum lease payments			42,500,000
Infrastructure reimbursement	$ 8,800,000	$ 9,200,000	4,300,000	$ 1,000,000
City Of Henderson
Other Assets Non Current [Line Items]
Infrastructure reimbursement		$ 8,800,000	3,100,000
Annual interest rate		6.00%
City Of Henderson | Notes Payable
Other Assets Non Current [Line Items]
Debt instrument expiry year		2036
OPA | City of Henderson Redevelopment Agency
Other Assets Non Current [Line Items]
Tax increment reimbursement percentage		75.00%
OPA | Maximum | City of Henderson Redevelopment Agency
Other Assets Non Current [Line Items]
Reimbursement revenue		$ 209,000,000
Chemicals | Leverkusen TiO2 production facility
Other Assets Non Current [Line Items]
Operating lease liability		$ 7,000,000
Future minimum lease payments			$ 17,000,000
LPC
Other Assets Non Current [Line Items]
Percentage owned manufacturing joint venture under equity method investment		50.00%
LPC | Chemicals
Other Assets Non Current [Line Items]
Percentage owned manufacturing joint venture under equity method investment		50.00%
Venator Materials PLC | Tioxide Group
Other Assets Non Current [Line Items]
Parent company ownership interest		100.00%