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DISPOSITION AND HELD FOR SALE (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jul. 01, 2015
Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]            
Investment in equity method investee     $ (37) $ 0    
Equity method investments $ 478   478     $ 46
Recognized a pre-tax gain 334 $ 0 334 0    
Deferred tax liability     138 $ (21)    
Goodwill reclassified to non-current assets held for sale 113          
Q² Solutions [Member]            
Schedule of Equity Method Investments [Line Items]            
Investment in equity method investee     (37)      
Noncontrolling interest, ownership percentage         40.00%  
Equity method investments 422   422      
Excess of equity in underlying net assets $ 219   $ 219      
Q² Solutions [Member] | Equity Method Investment, Basis Difference [Member]            
Schedule of Equity Method Investments [Line Items]            
Amount allocated to finite-lived intangible assets         $ 75  
Amortization period 8 years          
Clinical Trials [Member]            
Schedule of Equity Method Investments [Line Items]            
Recognized a pre-tax gain $ 334          
Deferred tax liability $ 145