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Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations | 12 Months Ended
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Dec. 31, 2022
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract] |
Schedule VI. Supplemental Information Concerning Property and Casualty Insurance Operations | SCHEDULE VI. SUPPLEMENTAL INFORMATION CONCERNING PROPERTY AND CASUALTY INSURANCE OPERATIONS
As of and for the years ended December 31 | Consolidated Property and Casualty Operations
(In millions) | 2022 |  | 2021 |  | 2020
Balance Sheet Data |  |  |  |  |
Deferred acquisition costs | $ | 806 |  |  | $ | 737 |  |  |
Reserves for unpaid claim and claim adjustment expenses | 25,099 |  |  | 24,174 |  |  |
Discount deducted from claim and claim adjustment expense reserves above (based on interest rates ranging from 3.5% to 6.4%) | 1,133 |  |  | 1,146 |  |  |
Unearned premiums | 6,374 |  |  | 5,761 |  |  |
Statement of Operations Data |  |  |  |  |
Net written premiums | $ | 9,128 |  |  | $ | 8,405 |  |  | $ | 8,059 |
Net earned premiums | 8,667 |  |  | 8,175 |  |  | 7,649 |
Net investment income | 1,751 |  |  | 2,111 |  |  | 1,896 |
Incurred claim and claim adjustment expenses related to current year | 6,243 |  |  | 5,970 |  |  | 5,793 |
Incurred claim and claim adjustment expenses related to prior years | (187) |  |  | (104) |  |  | (119) |
Amortization of deferred acquisition costs | 1,490 |  |  | 1,443 |  |  | 1,410 |
Paid claim and claim adjustment expenses | 5,261 |  |  | 4,844 |  |  | 5,164 |

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- Definition The entire disclosure of supplemental information for registrant, its subsidiary and 50-percent-or-less-owned equity basis investee, with liability for property-casualty insurance claim. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI https://asc.fasb.org/extlink&oid=120401096&loc=d3e575016-122915 + Details
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