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Income Taxes | 3 Months Ended
--- | ---
Mar. 31, 2025
Income Tax Disclosure [Abstract] |
Income Taxes | 12. Income Taxes Income Tax Expense
Income Tax Rate Reconciliation
|  |  | Three Months Ended March 31,
|  |  |  | 2025 | 2024
Tax provision at U.S. federal statutory rate |  |  |  | $ | 165 |  | $ | 191 |
Nontaxable net investment income |  |  |  | (5) |  | (11) |
Decrease in deferred tax valuation allowance |  |  |  | — |  | (12) |
Stock-based compensation, net |  |  |  | (12) |  | (16) |
Other |  |  |  | 5 |  | 6 |
Provision for income taxes |  |  |  | $ | 153 |  | $ | 158 |
Uncertain Tax Positions
Rollforward of Unrecognized Tax Benefits |  |
|  |  | Three Months Ended March 31, |  |
|  |  |  | 2025 | 2024 |  |
Balance, beginning of period |  |  |  | $ | 24 |  | $ | 26 |  |  |
Gross increases - tax positions in current period |  |  |  | — |  | 1 |  |  |
Balance, end of period |  |  |  | $ | 24 |  | $ | 27 |  |  |
The entire amount of unrecognized tax benefits, if recognized, would affect the effective tax rate in the period of the release. The Company believes it is reasonably possible approximately $14 of its currently unrecognized tax benefits may be recognized by the end of 2025 as a result of a lapse of the applicable statute of limitations. Other Tax Matters The federal statute of limitations for the Company is closed through the 2020 tax year with the exception of net operating loss carryforwards utilized in open tax years and 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.

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