Managed Investment Entities - Progression of investment in CLO tranches (Details) - Variable interest entity, primary beneficiary - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Variable Interest Entity, Ownership [Roll Forward] | ||||
| Balance at beginning of period of ownership of CLO tranches | $ 149 | $ 148 | $ 143 | $ 175 |
| Purchases | 44 | 55 | 70 | 130 |
| Sales | (32) | (58) | (35) | (146) |
| Distributions | (10) | (13) | (23) | (31) |
| CLO earnings attributable to AFG | 4 | 6 | 0 | 10 |
| Balance at end of period of ownership of CLO tranches | $ 155 | $ 138 | $ 155 | $ 138 |