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EARNINGS PER SHARE (Details)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Weighted-average shares outstanding:    
Basic (in shares) 174,832,000 177,858,000
Dilutive securities (in shares) 10,430,000 9,390,000
Diluted (in shares) 185,262,000 187,248,000
Options outstanding excluded from the calculations as their effect would have been antidilutive (in shares) 200,000 700,000