Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Income Tax Contingency [Line Items]          
Income tax expense $ (85) $ (83) $ (157) $ (157)  
Effective income tax rate reconciliation, percent 40.70%   38.80%    
UNITED STATES          
Income Tax Contingency [Line Items]          
Effective income tax rate reconciliation, at federal statutory income tax rate, percent     35.00%    
Liberty | Tax Agreement          
Income Tax Contingency [Line Items]          
Current tax payments due to related parties $ 10   $ 10   $ 55