XML 94 R78.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Components of Income Tax Expense (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Federal        
Current $ 312 $ 493 $ 546 $ 1,024
Deferred 17 (37) 36 (157)
Federal income tax 329 456 582 867
State        
Current 62 81 154 146
Deferred 50 14 67 37
State income tax 112 95 221 183
Applicable income taxes $ 441 $ 551 $ 803 $ 1,050