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Managed Investment Entities - Selected financial information related to CLOs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Gains (losses) on change in fair value of assets/liabilities:
Assets	$ (75)	$ (2)	$ 144
Liabilities	49	6	(117)
Management fees paid to AFG	11	13	16
Variable interest entity, primary beneficiary
Gains (losses) on change in fair value of assets/liabilities:
CLO earnings attributable to AFG	$ 5	$ 33	$ 27

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- Definition

Earnings (losses) of variable interest entities attributable to AFG shareholders.

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No definition available.

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- Definition

Gain (loss) on change in fair value of assets of variable interest entities.

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No definition available.

+ Details

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- Definition

Gain (loss) on change in fair value of liabilities of variable interest entities.

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No definition available.

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- Definition

Gains losses on change in fair value of assets liabilities collateralized loan obligations.

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No definition available.

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- Definition

Management fees paid by variable interest entities.

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No definition available.

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- Details

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