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STOCK-BASED EMPLOYEE COMPENSATION STOCK-BASED EMPLOYEE COMPENSATION (Details Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Years
Jun. 30, 2011
Jun. 30, 2012
Restricted Stock Units, Performance Share Units and Restricted Stock Awards [Member]
Years
Dec. 31, 2011
Restricted Stock Units, Performance Share Units and Restricted Stock Awards [Member]
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
Mar. 31, 2012
Restricted Stock Units (RSUs) [Member]
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
Mar. 31, 2012
Stock Option Awards [Member]
Mar. 31, 2012
Performance Share Units 2012 Grants [Member]
Jun. 30, 2012
Performance Share Units 2012 Grants [Member]
Dec. 31, 2011
Performance Share Units 2011 Grants [Member]
Jun. 30, 2012
Performance Share Units 2011 Grants [Member]
Dec. 31, 2010
Performance Share Units 2010 Grants [Member]
Jun. 30, 2012
Performance Share Units 2010 Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Allocated Share-based Compensation Expense $ 17.6 $ 13.1 $ 34.1 $ 27.1                        
Exercised (in shares)     (85,987)                          
Exercised (in dollars per share) $ 19.69   $ 19.69                          
Outstanding at June 30, 2012 (in shares) 111,251   111,251                          
Outstanding at June 30, 2012 (in dollars per share) $ 21.50   $ 21.50                          
Outstanding at June 30, 2012 (in years)     2.0                          
Total future compensation cost related to unvested Share-Based Awards         114.8                      
Total future compensation cost related to unvested Share-Based Awards, expected period of recognition (in years)         2.0                      
Granted (in shares)         90,437   245 29,827     60,365   77,144   110,430  
Vesting period (in years)             3 years     3            
Aggregate grant-date fair value of restricted shares, performance share units and restricted stock units granted during the period             0.2 19.3 0.2   39.0          
Granted (in dollars per share)             $ 675.39 $ 645.86 $ 645.94   $ 645.86   $ 464.79   $ 235.34  
Grant date fair value                         $ 35.9   $ 26.0  
Unvested at June 30, 2012 (in shares)         542,530 799,980               76,122   85,105
Estimated number of probable shares to be issued (in shares)                       60,365   153,585   201,967
Maximum shares that could be issued (in shares)                       120,730   162,464   201,967
Minimum shares that could be issued (in shares)                       38,611