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Managed Investment Entities - Progression of investment in CLO tranches (Details) - Variable interest entity, primary beneficiary - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Variable Interest Entity [Line Items]      
Balance at beginning of period of ownership of CLO tranches $ 175 $ 177 $ 116
Purchases 186 133 67
Sales (175) (123) 0
Distributions (48) (45) (33)
CLO earnings attributable to AFG 5 33 27
Balance at end of period of ownership of CLO tranches $ 143 $ 175 $ 177