Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details)

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Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net $ 343 $ 32 $ 336 $ 28
Fair Value Option Securities - AFS        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Realized and unrealized gain (losses) AFS 212 165 348 148
Fair Value Option Securities - Liberty Broadband        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net 161   161  
Exchangeable Senior Debentures        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net (33) $ (133) (175) $ (120)
Other Financial Instruments        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Realized and unrealized gains (losses) on financial instruments, net $ 3   $ 2