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COMMITMENTS AND CONTINGENT LIABILITIES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 72 Months Ended
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Aug. 24, 2012
Recipients
Dec. 31, 2012
Class Action Settlement [Member]
Class_Action_Lawsuits
Jun. 30, 2011
Tri State Clinical Laboratory Services LLC [Member]
May 03, 2011
MEDTOX Acquisition [Member]
Pending or Threatened Litigation [Member]
Class_Action_Lawsuits
Dec. 31, 2012
Medicaid Billing [Member]
Pending or Threatened Litigation [Member]
Subpoenas
Loss Contingencies [Line Items]                  
Loss related to litigation settlement   $ 34.5              
Previously recorded litigation reserve in connection with false claims act lawsuit   15.0              
Payment of legal settlement 49.5                
Number of subpoenas received                 3
Number of shareholder class actions               3  
Number of putative class actions           3      
Ownership interest percentage, parent             50.00%    
Number of recipients         39        
Proposed damages per violation         0.0005        
Letters of credit   37.4              
Future minimum rental commitments [Abstract]                  
2013   166.9              
2014   133.9              
2015   94.5              
2016   61.2              
2017   39.6              
Thereafter   87.7              
Total minimum lease payments   583.8              
Less: amounts included in restructuring and acquisition related accruals   (9.9)              
Less: non-cancelable sub-lease income   0              
Total minimum operating lease payments   573.9              
Rental expense   $ 226.0 $ 220.2 $ 202.1