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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Available-for-sale) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Document Period End Date Sep. 30, 2017  
Marketable Securities, Amortized Cost $ 4,923 $ 4,753
Marketable Securities, Gross Unrealized Gain in Accumulated OCI 49 10
Marketable Securities, Gross Unrealized Loss in Accumulated OCI (4) (15)
Available-for-sale Securities 4,968 4,748
Available-for-sale Securities, Current 2,478 2,113
Available-for-sale Securities, Noncurrent 2,526 2,719
Available-for-sale securities including equity and fixed income funds 5,094 4,856
Certificates of Deposit [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable Securities, Amortized Cost 176 27
Available-for-sale Securities 176 27
Commercial Paper [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable Securities, Amortized Cost 977 750
Available-for-sale Securities 977 750
Corporate Debt Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable Securities, Amortized Cost 3,713 3,945
Marketable Securities, Gross Unrealized Gain in Accumulated OCI 15 10
Marketable Securities, Gross Unrealized Loss in Accumulated OCI (3) (8)
Available-for-sale Securities 3,725 3,947
Equity Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Marketable Securities, Amortized Cost 57 31
Marketable Securities, Gross Unrealized Gain in Accumulated OCI 34  
Marketable Securities, Gross Unrealized Loss in Accumulated OCI (1) (7)
Available-for-sale Securities 90 24
Equity and fixed income funds [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Securities 126 108
Other assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Securities $ 90 $ 24