Other Insurance Liabilities and Separate Accounts - Roll Forward of Policyholders' Funds (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023
Policyholder Account Balance [Roll Forward]
Policyholders’ funds, beginning of the period	$ 332	$ 345
Deposits received	2	1
Policy charges	(1)	(2)
Surrenders and withdrawals	(9)	(23)
Interest credited	8	9
Change in net unrealized gains (losses)	17	(4)
Other	(18)	(23)
Policyholders’ funds, end of the period	$ 331	$ 303
Weighted average crediting rate	4.30%	4.40%
Net amount at risk	$ 0	$ 0
Cash surrender value	$ 310	$ 324

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Policyholder Account Balance, Deposits Received

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Amount of cash to be paid to policyholder upon termination and surrender of long-duration contract issued by insurance entity.

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Amount of interest expense for allocation to policyholder account balance.

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Amount of increase (decrease) in liability for policyholder account balance from change, classified as other.

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Amount of guaranteed benefit in excess of current account balance of policyholder account balance.

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Amount of decrease in liability for policyholder account balance from policy charge.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of decrease in liability for policyholder account balance from contract redemption and withdrawal of funds.

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Weighted-average crediting rate for liability for policyholder account balance, calculated at a point in time.

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Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense.

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