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, 2017
Dec. 31, 2016
Fair values of financial instruments    
Non-qualified employee benefit plan investments $ 33 $ 27
Carrying Amount    
Fair values of financial instruments    
Non-qualified employee benefit plan investments 33 27
Investments in equity securities   18
Long-term debt (including current portion) (2,298) (4,172)
Carrying Amount | Cross Currency Interest Rate Contracts    
Fair values of financial instruments    
Derivative contracts - assets   29
Carrying Amount | Interest rate contracts    
Fair values of financial instruments    
Derivative contracts - liabilities (1) (2)
Estimated Fair Value    
Fair values of financial instruments    
Non-qualified employee benefit plan investments 33 27
Investments in equity securities   18
Long-term debt (including current portion) (2,483) (4,345)
Estimated Fair Value | Cross Currency Interest Rate Contracts    
Fair values of financial instruments    
Derivative contracts - assets   29
Estimated Fair Value | Interest rate contracts    
Fair values of financial instruments    
Derivative contracts - liabilities $ (1) $ (2)