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FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Long-term Debt [Member]
   
Financial Instruments [Line Items]    
Financial Instruments, Cost $ (471) $ (507)
Financial Instruments, Gross Unrealized Gains 0 0
Financial Instruments, Gross Unrealized Loss (116) (148)
Financial Instruments, Fair Value (587) (655)
Debt Securities [Member]
   
Financial Instruments [Line Items]    
Financial Instruments, Cost 5 [1] 3 [1]
Financial Instruments, Gross Unrealized Gains 0 [1] 0 [1]
Financial Instruments, Gross Unrealized Loss 0 [1] 0 [1]
Financial Instruments, Fair Value 5 [1] 3 [1]
Total Marketable Securities [Member]
   
Financial Instruments [Line Items]    
Financial Instruments, Cost 5 [1] 3 [1]
Financial Instruments, Gross Unrealized Gains 0 [1] 0 [1]
Financial Instruments, Gross Unrealized Loss 0 [1] 0 [1]
Financial Instruments, Fair Value $ 5 [1] $ 3 [1]
[1] Included in “Other investments” in the consolidated balance sheets.