Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - TAX CREDITS AND OPERATING LOSS CARRYFORWARDS (Details)

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INCOME TAXES - TAX CREDITS AND OPERATING LOSS CARRYFORWARDS (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Income Tax          
Deferred Tax Assets, Operating Loss Carryforwards     $ 359   $ 281
Releases of valuation allowances     $ 132 $ 22  
Basis difference in Venator investment         199
Luxembourg          
Income Tax          
Operating loss carryforwards         581
Operating loss carryforwards, valuation allowance         92
Deferred Tax Assets, Operating Loss Carryforwards         145
Releases of valuation allowances $ 24     15  
Italy          
Income Tax          
Releases of valuation allowances       $ 7  
Switzerland          
Income Tax          
Releases of valuation allowances   $ 80      
Carryover period     7 years    
UK          
Income Tax          
Releases of valuation allowances   $ 15      
Non-US jurisdictions          
Income Tax          
Operating loss carryforwards         1,185
Operating loss carryforwards, subject to expiration         175
Portion of operating loss carryforwards that are subject to expiration, subject to valuation allowance         162
Releases of valuation allowances     $ 13    
Non-US jurisdictions | Expiration in 2018          
Income Tax          
Portion of operating loss carryforwards that are subject to expiration, subject to valuation allowance     $ 91    
Non-US jurisdictions | Expiration in 2019          
Income Tax          
Portion of operating loss carryforwards that are subject to expiration, subject to valuation allowance         111
Non-US jurisdictions | Expiration in 2020          
Income Tax          
Operating loss carryforwards, subject to expiration         88
Portion of operating loss carryforwards that are subject to expiration, subject to valuation allowance         87
Venator Materials PLC          
Income Tax          
Tax benefit related to realized portion of deferred tax asset attributable to basis difference in investment         153
Basis difference in Venator investment         199
Valuation allowance         46
Deferred tax asset, carryforward         18
Venator Materials PLC | Australia          
Income Tax          
Operating loss carryforwards, valuation allowance         $ 11