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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2024
Income Tax Disclosure [Abstract]  
Income Tax Rate Reconciliation
Income Tax Rate Reconciliation
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Tax provision at U.S. federal statutory rate$200 $171 $583 $449 
Nontaxable investment income(9)(12)(31)(32)
Other (6)(35)(12)
Provision for income taxes$185 $162 $517 $405 
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Rollforward of Unrecognized Tax Benefits
 Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Balance, beginning of period$27 $23 $26 $22 
Gross increases - tax positions in current period
Gross decreases - tax positions in current period(1)— (1)— 
Lapse of statute of limitations(4)— (4)(1)
Balance, end of period$23 $25 $23 $25