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EARNINGS PER SHARE (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Jun. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Convertible Senior Debentures Due in 2029 [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 6.00%   6.00%  
Convertible Senior Debentures Due in 2026 [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 1.75%   1.75%  
Stock Appreciation Rights (SARs) [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     1,000,000 1,200,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Exercise Price (in dollars per share)     $ 64 $ 62
Convertible Debt Securities [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of Dilutive Securities on Earnings Per Share (in dollars per share) $ (0.17) $ (0.11) $ (0.48) $ (0.35)
Convertible Debt Securities [Member] | Convertible Senior Debentures Due in 2029 [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Debt Instrument, Convertible, Conversion Price (in dollars per share) $ 28.87   $ 28.87  
Earnings Per Share Dilution Limit (in shares)     11,949,513