Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of loss contingency liability.

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The amount of insurance-related assessment liability that is expected to be recovered through a premium tax offset based on current laws applied to in-force policies.

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The liability as of the balance sheet date representing required funding mandated by statute or regulatory authority that is related directly or indirectly to underwriting activities, including pools for self-insurance and excluding premium taxes and income taxes. The funds derived from the assessments generally enable a government guarantor to pay insurance claims in the event that the underwriting insurer is insolvent or otherwise unable to meet its payment obligations.

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Contingencies (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2023
Contingencies
Estimated liability related to guaranty fund assessments	$ 37	$ 12
Related premium tax asset		$ 10	$ 31
SEC document and information requests legal matter
Contingencies
Loss contingency accrual			$ 20