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, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Variable Interest Entity, Ownership [Roll Forward] | ||||
| Balance at beginning of period of ownership of CLO tranches | $ 122 | $ 201 | $ 175 | $ 177 |
| Purchases | 40 | 45 | 75 | 84 |
| Sales | (9) | (81) | (88) | (100) |
| Distributions | (7) | (15) | (18) | (25) |
| CLO earnings attributable to AFG | 2 | 9 | 4 | 23 |
| Balance at end of period of ownership of CLO tranches | $ 148 | $ 159 | $ 148 | $ 159 |