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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Income Tax Expense (Benefit) | Income Tax Expense
| For the years ended December 31,
| 2020 | 2019 | 2018
Income tax expense (benefit) |  |  |
Current - U.S. federal | $ | 410 |  | $ | 8 |  | $ | (18) |
Foreign | — |  | — |  | — |
Total current | 410 |  | 8 |  | (18) |
Deferred - U.S. federal | (20) |  | 476 |  | 286 |
Foreign | (7) |  | (9) |  | — |
Total deferred | (27) |  | 467 |  | 286 |
Total income tax expense | $ | 383 |  | $ | 475 |  | $ | 268 |
Income Tax Rate Reconciliation | Income Tax Rate Reconciliation
| For the years ended December 31,
| 2020 | 2019 | 2018
Tax provision at U.S. Federal statutory rate | $ | 445 |  | $ | 538 |  | $ | 368 |
Tax-exempt interest | (46) |  | (56) |  | (66) |
Increase in deferred tax valuation allowance | 9 |  | 2 |  | — |
Sale of business | (8) |  | — |  | — |
Carryback benefit | (5) |  | — |  | — |
Tax law change | (6) |  | — |  | (39) |
Other | (6) |  | (9) |  | 5 |
Provision for income taxes | $ | 383 |  | $ | 475 |  | $ | 268 |
Deferred Tax Assets (Liabilities) | Deferred Tax Assets (Liabilities)
| As of December 31,
| 2020 | 2019
Deferred tax assets |  |
Loss reserves and tax discount | $ | 312 |  | $ | 214 |
Unearned premium reserve and other underwriting related reserves | 384 |  | 385 |
Investment-related items | 125 |  | 130 |
Employee benefits | 282 |  | 287 |
Net operating loss carryover | 11 |  | 84 |
Other | 34 |  | 27 |
Total deferred tax assets | 1,148 |  | 1,127 |
Valuation allowance | (4) |  | (4) |
Deferred tax assets, net of valuation allowance | 1,144 |  | 1,123 |
Deferred tax liabilities |  |
Deferred acquisition costs | (120) |  | (143) |
Net unrealized gains on investments | (758) |  | (458) |
Other depreciable and amortizable assets | (220) |  | (223) |
Total deferred tax liabilities | (1,098) |  | (824) |
Net deferred tax asset | $ | 46 |  | $ | 299 |
Roll-forward of Unrecognized Tax Benefits | Rollforward of Unrecognized Tax Benefits
| For the years ended December 31, |  |
| 2020 | 2019 | 2018 |  |
Balance, beginning of period | $ | 14 |  | $ | 14 |  | $ | 9 |  |  |
Gross increases - tax positions in prior period | — |  | — |  | 5 |  |  |
Gross decreases - tax positions in prior period | — |  | — |  | — |  |  |
Gross increases - tax positions in current period | 1 |  | — |  | — |  |  |
Balance, end of period | $ | 15 |  | $ | 14 |  | $ | 14 |  |  |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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