Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

v3.10.0.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Income Tax Contingency [Line Items]          
Income tax expense $ (69) $ (58) $ (224) $ (225)  
Effective income tax rate reconciliation, percent 28.50% 25.90% 26.70% 33.20%  
UNITED STATES          
Income Tax Contingency [Line Items]          
Effective income tax rate reconciliation, at federal statutory income tax rate, percent     21.00% 35.00%  
Liberty | Tax Agreement          
Income Tax Contingency [Line Items]          
Current tax payments due to related parties $ 7   $ 7   $ 60