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FINANCIAL INSTRUMENTS (Accounting for Derivative Instruments and Hedging Activities) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Financial Instruments [Line Items]    
AOCI, Net gain (loss) in net investment in foreign operations $ (76) $ 113
Interest rates    
Financial Instruments [Line Items]    
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net   1
Foreign currency    
Financial Instruments [Line Items]    
AOCI, Net gain (loss) in cash flow hedging instruments (19) 15
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months   13
Commodities    
Financial Instruments [Line Items]    
AOCI, Net gain (loss) in cash flow hedging instruments (73) (87)
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months   (45)
Foreign Currency Denominated Debt    
Financial Instruments [Line Items]    
Nonderivative Instruments Notional 177 182
Equity securities    
Financial Instruments [Line Items]    
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities 0  
Derivatives designated as hedging instruments: | Cash flow hedges: | Interest rates    
Financial Instruments [Line Items]    
AOCI, Net gain (loss) in cash flow hedging instruments $ (3) $ 23