Annual report pursuant to Section 13 and 15(d)

FAIR VALUE - FAIR VALUES OF FINANCIAL INSTRUMENTS (Details)

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FAIR VALUE - FAIR VALUES OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Fair values of financial instruments    
Non-qualified employee benefit plan investments $ 32 $ 33
Carrying Amount    
Fair values of financial instruments    
Non-qualified employee benefit plan investments 23 33
Forward swap contract related to the sale of investment in Venator 14  
Long-term debt (including current portion) (2,320) (2,298)
Estimated Fair Value    
Fair values of financial instruments    
Non-qualified employee benefit plan investments 23 33
Forward swap contract related to the sale of investment in Venator 14  
Long-term debt (including current portion) $ (2,403) $ (2,483)