Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Liberty
Dec. 31, 2012
Liberty
Income Tax Disclosure [Line Items]            
Income tax expense $ (81) $ (92) $ (143) $ (174)    
Effective income tax rate 36.80%   36.90%      
United States Federal Statutory Tax Rate 35.00%          
Current tax payments due to related parties         $ 1 $ (70)