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Strategic Investments (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Dec. 31, 2015
Apr. 30, 2015
Apr. 13, 2015
Schedule of Equity Method Investments [Line Items]          
Equity Method Investments $ 255 $ 255 $ 173    
Cost Method Investments 20 20 45    
Notes Receivable From Portfolio Companies 42 42 $ 30    
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity 184 184      
Net Losses from Equity Method Adjustments $ (4) $ (11)      
Frankenman [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage         25.00%
Preventice [Member]          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage       27.00%  
Common Stock Interest Acquired       18.50%