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FINANCIAL INSTRUMENTS (Investments) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Investment Holdings [Line Items]      
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 0 $ 0  
Debt Securities Maturity less than 10 years    
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]      
Investment Holdings [Line Items]      
Available-for-sale Securities, Fair Value Disclosure $ 5   $ 5