XML 203 R140.htm IDEA: XBRL DOCUMENT v3.20.4
Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Tax provision at U.S. Federal statutory rate $ 445 $ 538 $ 368
Tax-exempt interest (46) (56) (66)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 9 2 0
Effective Income Tax Rate Reconciliation, Disposition of Business, Amount (8) 0 0
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount (5) 0 0
Tax law change 6 0 39
Other 6 9 (5)
Total income tax expense (benefit) $ 383 $ 475 $ 268