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Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2021
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract] |
Supplementary Insurance Information | AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES SCHEDULE III — SUPPLEMENTARY INSURANCE INFORMATION THREE YEARS ENDED DECEMBER 31, 2021 (IN MILLIONS)
Segment |  | Deferred policy acquisition costs |  | Reserves for claims and unpaid losses and LAE |  | Unearned premiums |  | Net earned premiums |  | Net investment income |  | Claims, losses and settlement expenses |  | Amortization of deferred policy acquisition costs |  | Other operating expenses |  | Net written premiums
2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and casualty insurance |  | $ | 267 |  |  | $ | 11,074 |  |  | $ | 3,041 |  |  | $ | 5,404 |  |  | $ | 663 |  |  | $ | 3,157 |  |  | $ | 580 |  |  | $ | 967 |  |  | $ | 5,573 |
Other |  | — |  |  | — |  |  | — |  |  | — |  |  | 67 |  |  | — |  |  | — |  |  | 513 |  |  | — |
Total |  | $ | 267 |  |  | $ | 11,074 |  |  | $ | 3,041 |  |  | $ | 5,404 |  |  | $ | 730 |  |  | $ | 3,157 |  |  | $ | 580 |  |  | $ | 1,480 |  |  | $ | 5,573 |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and casualty insurance |  | $ | 244 |  |  | $ | 10,392 |  |  | $ | 2,803 |  |  | $ | 5,099 |  |  | $ | 399 |  |  | $ | 3,271 |  |  | $ | 615 |  |  | $ | 1,036 |  |  | $ | 5,013 |
Other |  | — |  |  | — |  |  | — |  |  | — |  |  | 62 |  |  | — |  |  | — |  |  | 508 |  |  | — |
Total |  | $ | 244 |  |  | $ | 10,392 |  |  | $ | 2,803 |  |  | $ | 5,099 |  |  | $ | 461 |  |  | $ | 3,271 |  |  | $ | 615 |  |  | $ | 1,544 |  |  | $ | 5,013 |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and casualty insurance |  | $ | 322 |  |  | $ | 10,232 |  |  | $ | 2,830 |  |  | $ | 5,185 |  |  | $ | 472 |  |  | $ | 3,271 |  |  | $ | 721 |  |  | $ | 1,027 |  |  | $ | 5,342 |
Other |  | — |  |  | — |  |  | — |  |  | — |  |  | 60 |  |  | — |  |  | — |  |  | 560 |  |  | — |
Total |  | $ | 322 |  |  | $ | 10,232 |  |  | $ | 2,830 |  |  | $ | 5,185 |  |  | $ | 532 |  |  | $ | 3,271 |  |  | $ | 721 |  |  | $ | 1,587 |  |  | $ | 5,342 |

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- Definition The entire disclosure for supplementary insurance information by segment. Includes, but is not limited to, deferred policy acquisition cost; future policy benefit, loss, claim and loss expenses; unearned premium; other policy claim and benefit payable; premium revenue; net investment income; benefit, claim, loss and settlement expenses; amortization of deferred policy acquisition cost; other operating expense; and premium written. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16) -URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915 + Details
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