Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

v3.8.0.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Income Tax Contingency [Line Items]          
Income tax expense $ (58) $ (66) $ (225) $ (244)  
Effective income tax rate reconciliation, percent 25.90%   33.20%    
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 from related parties $ 3   $ 3    
Current tax payments due to related parties         $ 75