XML 111 R65.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current      
Current federal income tax expense $ 10 $ 77 $ 17
Current state income tax expense 3 13 1
Deferred      
Deferred federal income tax expense (benefit) 24 (366) 20
Deferred state income tax expense (benefit) 9 (3) 2
Total income tax expense (benefit) $ 46 $ (279) $ 40