Policyholder Account Balances, Future Policy Benefits and Claims - Composition (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Policyholder account balances
Policyholder account balances	$ 26,712	$ 24,986	$ 23,723
Future policy benefits
Reserve for future policy benefits	7,142	7,495	$ 9,721
Deferred profit liability	77	62
Additional liabilities for insurance guarantees	1,246	1,186
Other insurance and annuity liabilities	169	177
Total future policy benefits	8,634	8,920		$ 10,386
Policy claims and other policyholders’ funds	180	226
Total policyholder account balances, future policy benefits and claims	$ 35,526	$ 34,132

Liability For Future Policy Benefit, Before Reinsurance, Additional Liabilities For Insurance Guarantees

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- Definition

Liability For Future Policy Benefit, Before Reinsurance, Deferred Profit Liability

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Liability For Future Policy Benefit, Before Reinsurance, Other Insurance And Annuity Liabilities

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Liability For Future Policy Benefit, Before Reinsurance, Reserve

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- Definition

Policyholder Account Balance, Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense

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Policyholder Account Balances 1

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- Definition

The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.

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Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract.

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- Definition

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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