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FINANCIAL INSTRUMENTS Derivatives (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Collateral, Right to Reclaim Cash, Offset $ 20   $ 26
Derivative Asset, Collateral, Obligation to Return Cash, Offset 0   34
Hedge Gain (Loss) to be Reclassified During Next 12 Months, Excluded Components, Net 57    
Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months 11    
Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months (42)    
Interest Rate Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net 1    
Fair Value, Inputs, Level 2 [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 290   336
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 116   125
Derivative Asset 174   211
Derivative Liability, Fair Value, Gross Liability 467   425
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 125   140
Derivative Liability 342   285
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 249   163
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 98   58
Derivative Asset 151   105
Derivative Liability, Fair Value, Gross Liability 432   307
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 103   69
Derivative Liability 329   238
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 41   173
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 18   67
Derivative Asset 23   106
Derivative Liability, Fair Value, Gross Liability 35   118
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 22   71
Derivative Liability 13   47
Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 161   98
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 89   42
Derivative Asset 72   56
Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 31   47
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 5   13
Derivative Asset 26   34
Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 29   128
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 15   64
Derivative Asset 14   64
Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 8   41
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 1   1
Derivative Asset 7   40
Fair Value, Inputs, Level 2 [Member] | Deferred charges and other assets [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 57   18
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 4   3
Derivative Asset 53   15
Fair Value, Inputs, Level 2 [Member] | Deferred charges and other assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 4   4
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 2   2
Derivative Asset 2   2
Fair Value, Inputs, Level 2 [Member] | Accrued and Other Current Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 98   46
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 89   42
Derivative Liability 9   4
Fair Value, Inputs, Level 2 [Member] | Accrued and Other Current Liabilities [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 93   111
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 6   18
Derivative Liability 87   93
Fair Value, Inputs, Level 2 [Member] | Accrued and Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 20   103
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 15   64
Derivative Liability 5   39
Fair Value, Inputs, Level 2 [Member] | Accrued and Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 8   7
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 4   4
Derivative Liability 4   3
Fair Value, Inputs, Level 2 [Member] | Other Noncurrent Obligations [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 60   86
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 8   9
Derivative Liability 52   77
Fair Value, Inputs, Level 2 [Member] | Other Noncurrent Obligations [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 181   64
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 0   0
Derivative Liability 181   64
Fair Value, Inputs, Level 2 [Member] | Other Noncurrent Obligations [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Fair Value, Gross Liability 7   8
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset 3   3
Derivative Liability 4   5
Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Liability, Notional Amount 181   182
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (36)   $ (43)
AOCI, Derivative Qualifying as Hedge, Excluded Component, after Tax 86    
Derivatives used in Net Investment Hedge, Gain (Loss), Reclassified to Earnings, Net of Tax 25    
Other Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 31 $ (17)