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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Fair Value of Financial Instruments) (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Long-term Debt $ (474) $ (474)
Long-term Debt, Fair Value (589) (541)
Long-term Debt [Member]    
Debt Securities, Available-for-sale [Line Items]    
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss (115) (67)
Money Market Funds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Cash Equivalents, at Carrying Value 10 10
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss 0 0
Cash Equivalents, Fair Value 10 $ 10
Fair Value, Nonrecurring [Member] | Manufacturing Assets [Member]    
Debt Securities, Available-for-sale [Line Items]    
Asset Impairment Charges $ 75