Annual report pursuant to Section 13 and 15(d)

GENERAL - SEPARATION AND DECONSOLIDATION (Details)

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GENERAL - SEPARATION AND DECONSOLIDATION (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 03, 2018
Dec. 31, 2018
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jan. 03, 2018
GENERAL                  
Aggregate proceeds from sale of investment             $ 3    
Equity Securities, FV-NI, Unrealized Loss             $ 62    
Discontinued Operations, Held-for-sale | Venator Pigments and Additives Business                  
GENERAL                  
Valuation allowance               $ 270  
Discontinued Operations, Disposed of by Means Other than Sale | Venator Pigments and Additives Business                  
GENERAL                  
Pre-tax loss on discontinued operations     $ 427   $ 427        
Venator Materials PLC                  
GENERAL                  
Aggregate number shares sold   4,334,389              
Percentage of equity ownership interest sold   4.00%              
Aggregate proceeds from sale of investment       $ 16   $ 19      
Equity Method Investment, Ownership Percentage   49.00%              
Equity Securities, FV-NI, Unrealized Loss $ 57                
Venator Materials PLC | Over allotment                  
GENERAL                  
Underwriters purchased an additional shares                 1,948,955
Venator Materials PLC                  
GENERAL                  
Ownership interest (as a percent)                 53.00%