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SUMMARY OF ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2011
SUMMARY OF ACCOUNTING POLICIES [Abstract]  
Antidilutive stock options

        The following options to purchase shares of common stock were outstanding during a portion of 2011 and 2010 but were not included in the computation of diluted earnings per share because the exercise prices of the options were greater than the average market price of the common shares and, therefore, would be antidilutive. For 2009, none of the options outstanding were included in the computation of diluted earnings per share due to the net loss for the year.

For the year ended December 31, 2011  2010  2009 
Number of options (in millions) 4.4 6.0 N/A
Weighted average exercise price $34.74 $33.25 -