Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details)

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Assets And Liabilities Measured At Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Realized and unrealized (gains) losses on financial instruments, net $ 25 $ 61 $ (40) $ 158  
Cash equivalents 344   344   859
Short term marketable securities 240   240   15
Available-for-sale securities 1,092   1,092   1,293
Financial instrument assets 331   331   397
Debt 1,025   1,025   1,002
Level 1
          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash equivalents 344   344   859
Short term marketable securities 0   0   15
Available-for-sale securities 1,015   1,015   978
Financial instrument assets 0   0   0
Debt 0   0   0
Level 2
          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash equivalents 0   0   0
Short term marketable securities 240   240   0
Available-for-sale securities 77   77   315
Financial instrument assets 331   331   397
Debt 1,025   1,025   1,002
Fair Value Option Securities
          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Realized and unrealized (gains) losses on financial instruments, net 78 54 63 136  
Convertible Notes Payable
          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Realized and unrealized (gains) losses on financial instruments, net (82) [1] 0 [1] (23) [1] 0 [1]  
Other Financial Instruments
          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Realized and unrealized (gains) losses on financial instruments, net $ 29 [2] $ 7 [2] $ (80) [2] $ 22 [2]  
[1] Liberty issued $1 billion of cash convertible notes in October 2013 which are accounted for at fair value (Level 2), as elected by Liberty at the issuance of the notes.
[2] Derivatives, including the Charter warrants (as discussed in note 6) and the bond hedge (as discussed in note 8), are marked to market based on the trading price of underlying securities and other observable market data as the significant inputs (Level 2).