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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2022
Income Tax Disclosure [Abstract]  
Income Tax Rate Reconciliation
Income Tax Rate Reconciliation
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Tax provision at U.S. federal statutory rate$116 $233 $230 $297 
Tax-exempt interest(8)(10)(17)(21)
Other (18)(5)(17)
Provision for income taxes$110 $205 $208 $259 
Roll-forward of Unrecognized Tax Benefits
Rollforward of Unrecognized Tax Benefits
 
Three Months Ended June 30,
Six Months Ended June 30,
 2022202120222021
Balance, beginning of period$17 $15 $16 $15 
Gross increases - tax positions in current period— — 
Balance, end of period$18 $15 $18 $15