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Income Taxes
 9 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Income Taxes
12. Income Taxes
Income Tax Expense
Income Tax Rate Reconciliation
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Tax provision at U.S. federal statutory rate$277 $200 $703 $583 
Nontaxable net investment income(9)(9)(23)(31)
Uncertain tax position reserve(10)(4)(9)(3)
Tax credits(13)(2)(28)(10)
Other (7)— (1)(22)
Provision for income taxes$238 $185 $642 $517 
Uncertain Tax Positions
Rollforward of Unrecognized Tax Benefits
 Three Months Ended September 30,Nine Months Ended September 30,
 2025202420252024
Balance, beginning of period$25 $27 $24 $26 
Gross increases - tax positions in current period4 1 5 2 
Gross decreases - tax positions in current period— (1)— (1)
Lapse of statute of limitations(14)(4)(14)(4)
Balance, end of period$15 $23 $15 $23 
The entire amount of unrecognized tax benefits, if recognized, would affect the effective tax rate in the period of the release.
Other Tax Matters
H.R.1, known as the “One Big Beautiful Bill Act” was signed into law on July 4, 2025. This comprehensive budget reconciliation package consolidates a wide array of public policy priorities, reshaping federal policy across numerous sectors of the American economy, including taxation, healthcare, social safety nets, immigration, and education. The changes in H.R.1 do not currently have a material impact on the Company's results of operations nor are they expected to in future periods.
The federal statute of limitations for the Company is closed through the 2021 tax year with the exception of the Navigators pre-acquisition 2019 tax period. Management believes that adequate provision has been made in the Company's Condensed Consolidated Financial Statements for any potential adjustments that may result from tax examinations and other tax-related matters for all open tax years.