Managed Investment Entities - Progression of investment in CLO tranches (Details) - Variable interest entity, primary beneficiary - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Variable Interest Entity, Ownership [Roll Forward] | ||||
| Balance at beginning of period of ownership of CLO tranches | $ 133 | $ 122 | $ 143 | $ 175 |
| Purchases | 15 | 40 | 26 | 75 |
| Sales | (3) | (9) | (3) | (88) |
| Distributions | (5) | (7) | (13) | (18) |
| CLO earnings (losses) attributable to AFG | 9 | 2 | (4) | 4 |
| Balance at end of period of ownership of CLO tranches | $ 149 | $ 148 | $ 149 | $ 148 |