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Strategic Investments (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Apr. 30, 2015
Apr. 13, 2015
Schedule of Equity Method Investments [Line Items]        
Equity Method Investments $ 221 $ 173    
Cost Method Investments 25 45    
Notes Receivable From Portfolio Companies 32 $ 30    
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity $ 140      
Frankenman [Member]        
Schedule of Equity Method Investments [Line Items]        
Equity Method Investment, Ownership Percentage       25.00%
Preventis [Member]        
Schedule of Equity Method Investments [Line Items]        
Equity Method Investment, Ownership Percentage     27.00%  
Preventice [Member]        
Schedule of Equity Method Investments [Line Items]        
Common Stock Interest Acquired     18.50%