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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2023
Income Tax Disclosure [Abstract] |
Income Tax Rate Reconciliation |
Income Tax Rate Reconciliation
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2023 | 2022 |  | 2023 | 2022
Tax provision at U.S. federal statutory rate | $ | 141 |  | $ | 116 |  |  | $ | 278 |  | $ | 230 |
Nontaxable investment income | (9) |  | (5) |  |  | (20) |  | (14) |
Other | (7) |  | (1) |  |  | (15) |  | (8) |
Provision for income taxes | $ | 125 |  | $ | 110 |  |  | $ | 243 |  | $ | 208 |
Roll-forward of Unrecognized Tax Benefits |
Rollforward of Unrecognized Tax Benefits |  |
| Three Months Ended June 30, |  | Six Months Ended June 30, |  |
| 2023 | 2022 |  | 2023 | 2022 |  |
Balance, beginning of period | $ | 23 |  | $ | 17 |  |  | $ | 22 |  | $ | 16 |  |  |
Gross increases - tax positions in current period | 1 |  | 1 |  |  | 2 |  | 2 |  |  |
Lapse of statute of limitations | (1) |  | — |  |  | (1) |  | — |  |  |
Balance, end of period | $ | 23 |  | $ | 18 |  |  | $ | 23 |  | $ | 18 |  |  |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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- Definition Tabular disclosure of unrecognized tax benefits for which a material change is reasonably possible in the next twelve months, typically including the nature of the uncertainty, the event(s) that could cause a material change, and an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made. An unrecognized tax benefit is the difference between a tax position taken in a tax return and the amounts recognized in the financial statements for which it is more likely than not, based on the technical merits of the position, that the tax position will not be sustained upon examination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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