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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Income Tax Contingency [Line Items]          
Income tax expense $ (76) $ (90) $ (155) $ (167)  
Effective income tax rate reconciliation, percent 24.40% 37.30% 25.90% 36.90%  
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 $ 4   $ 4   $ 60