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FINANCIAL INSTRUMENTS FINANCIAL INSTRUMENTS Summary of Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis $ 1,888 $ 1,785
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 138 156
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 67 75
Available-for-sale Securities 1,959 1,866
Long-term Debt 21,091 16,756
Long-term Debt, Liabilities at Fair Value 22,807 18,000
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge 18 18
Long-term Debt [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Financial Instruments Gross Unrealized Gains 129 424
Financial Instruments Gross Unrealized Losses 1,845 1,668
Interest Rate Contract [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Financial Instruments Amortized Cost 0 0
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Losses 5 4
Derivative Liability 5 4
Commodity Contract [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Financial Instruments Amortized Cost 0 0
Financial Instruments Gross Unrealized Gains 56 6
Financial Instruments Gross Unrealized Losses 213 248
Derivative Liability 157 242
Foreign Exchange Contract [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Financial Instruments Amortized Cost 0 0
Financial Instruments Gross Unrealized Gains 84 109
Financial Instruments Gross Unrealized Losses 30 32
Derivative Asset 54 77
US Treasury and Government [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 607 597
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 13 22
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 12 7
Available-for-sale Securities 608 612
Corporate Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 623 633
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 27 26
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 5 8
Available-for-sale Securities 645 651
Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 1,230 1,230
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 40 48
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 17 15
Available-for-sale Securities 1,253 1,263
Equity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 658 555
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 98 108
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 50 60
Available-for-sale Securities $ 706 $ 603