Policyholders' Account Balances - Policyholder Account Balance (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	$ 83,079
Balance, end of period	86,934
Cash surrender value	747	$ 704
Policyholder account balance, supplemental contracts, liability		177
Annuities
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	80,046	14,694
Issuances	7,962	4,064
Acquisition from business combination	0	61,296
Premiums received	62	23
Policy charges	(287)	(122)
Surrenders and withdrawals	(5,037)	(3,060)
Interest credited	1,453	707
Benefit payments	(538)	(152)
Other	4	3
Balance, end of period	83,665	77,453
Total PAB balance, end of period	$ 84,687	$ 78,358
Weighted-average crediting rate	3.40%	2.88%
Net amount at risk	$ 12,907	$ 12,466
Cash surrender value	76,292	71,450
Annuities \| Supplemental contracts
Policyholder Account Balance [Roll Forward]
Reconciling items	496	489
Annuities \| Variable universal life
Policyholder Account Balance [Roll Forward]
Reconciling items	0	0
Annuities \| Variable deferred annuity
Policyholder Account Balance [Roll Forward]
Reconciling items	7	8
Annuities \| Embedded derivative and other
Policyholder Account Balance [Roll Forward]
Reconciling items	519	408
Life Insurance
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	2,107	1,975
Issuances	26	36
Acquisition from business combination	0	0
Premiums received	218	213
Policy charges	(189)	(187)
Surrenders and withdrawals	(55)	(43)
Interest credited	51	48
Benefit payments	0	0
Other	0	0
Balance, end of period	2,158	2,042
Total PAB balance, end of period	$ 2,247	$ 2,131
Weighted-average crediting rate	5.17%	4.78%
Net amount at risk	$ 38,673	$ 38,365
Cash surrender value	1,919	1,796
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	39	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	$ 50	$ 50

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Policyholder Account Balance, Including Reconciling Items

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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 decrease in liability for policyholder account balance from policy charge.

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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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