Policyholders' Account Balances - Policyholder Account Balance (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	$ 83,079
Balance, end of period	89,469
Cash surrender value	788	$ 732
Policyholder account balance, supplemental contracts, liability		177
Annuities
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	80,046	14,694
Issuances	12,851	8,192
Acquisition from business combination	0	61,296
Premiums received	87	46
Policy charges	(456)	(298)
Surrenders and withdrawals	(7,916)	(6,278)
Interest credited	2,236	1,467
Benefit payments	(817)	(386)
Other	6	4
Balance, end of period	86,037	78,737
Total PAB balance, end of period	$ 87,192	$ 80,248
Weighted-average crediting rate	3.60%	3.89%
Net amount at risk	$ 13,168	$ 12,495
Cash surrender value	78,463	72,719
Annuities \| Supplemental contracts
Policyholder Account Balance [Roll Forward]
Reconciling items	516	499
Annuities \| Variable universal life
Policyholder Account Balance [Roll Forward]
Reconciling items	0	0
Annuities \| Variable deferred annuity
Policyholder Account Balance [Roll Forward]
Reconciling items	6	8
Annuities \| Embedded derivative and other
Policyholder Account Balance [Roll Forward]
Reconciling items	633	1,004
Life Insurance
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	2,107	1,975
Issuances	35	51
Acquisition from business combination	0	0
Premiums received	324	314
Policy charges	(278)	(284)
Surrenders and withdrawals	(81)	(62)
Interest credited	71	74
Benefit payments	0	0
Other	0	0
Balance, end of period	2,178	2,068
Total PAB balance, end of period	$ 2,277	$ 2,165
Weighted-average crediting rate	5.18%	4.88%
Net amount at risk	$ 40,062	$ 38,548
Cash surrender value	1,944	1,826
Life Insurance \| Supplemental contracts
Policyholder Account Balance [Roll Forward]
Reconciling items	0	0
Life Insurance \| Variable universal life
Policyholder Account Balance [Roll Forward]
Reconciling items	40	39
Life Insurance \| Variable deferred annuity
Policyholder Account Balance [Roll Forward]
Reconciling items	0	0
Life Insurance \| Embedded derivative and other
Policyholder Account Balance [Roll Forward]
Reconciling items	$ 59	$ 58

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Policyholder Account Balance, Supplemental Contracts, Liability

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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 cash outflow to policyholder account balance from benefit payment.

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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 increase in liability for policyholder account balance from contract issuance.

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

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Amount of cash inflow to policyholder account balance from premium received.

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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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