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Income Taxes | 6 Months Ended
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Jun. 30, 2024
Income Tax Disclosure [Abstract] |
Income Taxes | 12. INCOME TAXES Income Tax Expense
Income Tax Rate Reconciliation
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2024 | 2023 |  | 2024 | 2023
Tax provision at U.S. federal statutory rate | $ | 192 |  | $ | 141 |  |  | $ | 383 |  | $ | 278 |
Nontaxable investment income | (11) |  | (9) |  |  | (22) |  | (20) |
Other | (7) |  | (7) |  |  | (29) |  | (15) |
Provision for income taxes | $ | 174 |  | $ | 125 |  |  | $ | 332 |  | $ | 243 |
Uncertain Tax Positions
Rollforward of Unrecognized Tax Benefits |  |
| Three Months Ended June 30, |  | Six Months Ended June 30, |  |
| 2024 | 2023 |  | 2024 | 2023 |  |
Balance, beginning of period | $ | 27 |  | $ | 23 |  |  | $ | 26 |  | $ | 22 |  |  |
Gross increases - tax positions in current period | — |  | 1 |  |  | 1 |  | 2 |  |  |
Lapse of statute of limitations | — |  | (1) |  |  | — |  | (1) |  |  |
Balance, end of period | $ | 27 |  | $ | 23 |  |  | $ | 27 |  | $ | 23 |  |  |
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 $4 of its currently unrecognized tax benefits associated with R&D credits claimed on the Company's 2020 tax return may be recognized by the end of 2024 as a result of a lapse in the applicable statute of limitations. Other Tax Matters Management has assessed the need for a valuation allowance against its deferred tax assets based on tax character and jurisdiction, and as part of this assessment, the Company reduced the valuation allowance related to the deferred tax asset for foreign net operating losses from $12 as of December 31, 2023 to $0 as of June 30, 2024. In making the assessment, management considered future taxable temporary difference reversals, future taxable income exclusive of reversing temporary differences and carryovers, taxable income in open carry back years and other tax planning strategies which management views as prudent and feasible. The federal income tax audits for the Company have been completed through 2013. The acquired Navigators Group is currently under IRS audit for the pre-acquisition 2019 tax period. The statute of limitations is closed through the 2019 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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