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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2025
Income Tax Disclosure [Abstract]  
Income Tax Rate Reconciliation
Income Tax Rate Reconciliation
Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Tax provision at U.S. federal statutory rate$261 $192 $426 $383 
Nontaxable net investment income(9)(11)(14)(22)
Other (1)(7)(8)(29)
Provision for income taxes$251 $174 $404 $332 
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Rollforward of Unrecognized Tax Benefits
 Three Months Ended June 30,Six Months Ended June 30,
 2025202420252024
Balance, beginning of period$24 $27 $24 $26 
Gross increases - tax positions in current period1 — 1 1 
Balance, end of period$25 $27 $25 $27