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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2025
Stockholders' Equity Note [Abstract] |
Components of accumulated other comprehensive income (loss) | The progression of the components of accumulated other comprehensive income (loss) is as follows (in millions):
|  |  | Other Comprehensive Income (Loss) |  |  |  |
| AOCI Beginning Balance |  | Pretax |  | Tax |  | Net of tax |  |  |  |  |  |  |  | AOCI Ending Balance
Quarter ended September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on securities arising during the period |  |  | $ | 72 |  |  | $ | (15) |  |  | $ | 57 |  |  |  |  |  |  |  |  |
Reclassification adjustment for realized (gains) losses included in net earnings (*) |  |  | 2 |  |  | (1) |  |  | 1 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on securities | $ | (101) |  |  | 74 |  |  | (16) |  |  | 58 |  |  |  |  |  |  |  |  | $ | (43) |
Net unrealized gains (losses) on cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on cash flow hedges arising during the period |  |  | (1) |  |  | 1 |  |  | — |  |  |  |  |  |  |  |  |
Reclassification adjustment for investment income included in net earnings (*) |  |  | 3 |  |  | (1) |  |  | 2 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on cash flow hedges | (5) |  |  | 2 |  |  | — |  |  | 2 |  |  |  |  |  |  |  |  | (3) |
Foreign currency translation adjustments | (28) |  |  | — |  |  | (1) |  |  | (1) |  |  |  |  |  |  |  |  | (29) |
Pension and other postretirement plan adjustments | 2 |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  | 2 |
Total | $ | (132) |  |  | $ | 76 |  |  | $ | (17) |  |  | $ | 59 |  |  |  |  |  |  |  |  | $ | (73) |
Quarter ended September 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on securities arising during the period |  |  | $ | 226 |  |  | $ | (48) |  |  | $ | 178 |  |  |  |  |  |  |  |  |
Reclassification adjustment for realized (gains) losses included in net earnings (*) |  |  | 15 |  |  | (3) |  |  | 12 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on securities | $ | (290) |  |  | 241 |  |  | (51) |  |  | 190 |  |  |  |  |  |  |  |  | $ | (100) |
Net unrealized gains (losses) on cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on cash flow hedges arising during the period |  |  | 11 |  |  | (3) |  |  | 8 |  |  |  |  |  |  |  |  |
Reclassification adjustment for investment income included in net earnings (*) |  |  | 6 |  |  | (1) |  |  | 5 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on cash flow hedges | (20) |  |  | 17 |  |  | (4) |  |  | 13 |  |  |  |  |  |  |  |  | (7) |
Foreign currency translation adjustments | (23) |  |  | (9) |  |  | 1 |  |  | (8) |  |  |  |  |  |  |  |  | (31) |
Pension and other postretirement plan adjustments | 2 |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  | 2 |
Total | $ | (331) |  |  | $ | 249 |  |  | $ | (54) |  |  | $ | 195 |  |  |  |  |  |  |  |  | $ | (136) |
|  |  | Other Comprehensive Income (Loss) |  |  |  |
| AOCI Beginning Balance |  | Pretax |  | Tax |  | Net of tax |  |  |  |  |  |  |  | AOCI Ending Balance
Nine months ended September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on securities arising during the period |  |  | $ | 184 |  |  | $ | (38) |  |  | $ | 146 |  |  |  |  |  |  |  |  |
Reclassification adjustment for realized (gains) losses included in net earnings (*) |  |  | 17 |  |  | (4) |  |  | 13 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on securities | $ | (202) |  |  | 201 |  |  | (42) |  |  | 159 |  |  |  |  |  |  |  |  | $ | (43) |
Net unrealized gains (losses) on cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on cash flow hedges arising during the period |  |  | 1 |  |  | — |  |  | 1 |  |  |  |  |  |  |  |  |
Reclassification adjustment for investment income included in net earnings (*) |  |  | 8 |  |  | (2) |  |  | 6 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on cash flow hedges | (10) |  |  | 9 |  |  | (2) |  |  | 7 |  |  |  |  |  |  |  |  | (3) |
Foreign currency translation adjustments | (30) |  |  | 1 |  |  | — |  |  | 1 |  |  |  |  |  |  |  |  | (29) |
Pension and other postretirement plan adjustments | 2 |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  | 2 |
Total | $ | (240) |  |  | $ | 211 |  |  | $ | (44) |  |  | $ | 167 |  |  |  |  |  |  |  |  | $ | (73) |
Nine months ended September 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on securities arising during the period |  |  | $ | 216 |  |  | $ | (46) |  |  | $ | 170 |  |  |  |  |  |  |  |  |
Reclassification adjustment for realized (gains) losses included in net earnings (*) |  |  | 21 |  |  | (4) |  |  | 17 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on securities | $ | (287) |  |  | 237 |  |  | (50) |  |  | 187 |  |  |  |  |  |  |  |  | $ | (100) |
Net unrealized gains (losses) on cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) on cash flow hedges arising during the period |  |  | (7) |  |  | 1 |  |  | (6) |  |  |  |  |  |  |  |  |
Reclassification adjustment for investment income included in net earnings (*) |  |  | 20 |  |  | (4) |  |  | 16 |  |  |  |  |  |  |  |  |
Total net unrealized gains (losses) on cash flow hedges | (17) |  |  | 13 |  |  | (3) |  |  | 10 |  |  |  |  |  |  |  |  | (7) |
Foreign currency translation adjustments | (17) |  |  | (14) |  |  | — |  |  | (14) |  |  |  |  |  |  |  |  | (31) |
Pension and other postretirement plan adjustments | 2 |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  | 2 |
Total | $ | (319) |  |  | $ | 236 |  |  | $ | (53) |  |  | $ | 183 |  |  |  |  |  |  |  |  | $ | (136) |
(*)The reclassification adjustments affected the following lines in AFG’s Statement of Earnings:
| OCI component |  | Affected line in the statement of earnings |
| Pretax - Net unrealized gains (losses) on securities |  | Realized gains (losses) on securities |
| Pretax - Net unrealized gains (losses) on cash flow hedges |  | Net investment income |
| Tax |  | Provision for income taxes |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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- References No definition available. + Details
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