POLICYHOLDERS' ACCOUNT BALANCES - Schedule of 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	$ 82,153	$ 24,431
Acquisition from business combination		61,296
Issuances	7,988	4,100
Derecognition		(7,402)
Premiums received	280	282
Policy charges	(476)	(330)
Surrenders and withdrawals	(5,092)	(3,366)
Interest credited	1,504	856
Benefit payments	(538)	(177)
Other	6	(195)
Balance, end of period	85,825	79,495
Net amount at risk	12,460	12,051
Annuities
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	80,046	22,456
Acquisition from business combination		61,296
Issuances	7,962	4,064
Derecognition		(7,402)
Premiums received	62	69
Policy charges	(287)	(143)
Surrenders and withdrawals	(5,037)	(3,323)
Interest credited	1,453	808
Benefit payments	(538)	(177)
Other	6	(195)
Balance, end of period	$ 83,667	$ 77,453
Weighted-average crediting rate	3.00%	3.00%
Net amount at risk	$ 12,907	$ 12,466
Cash surrender value	76,292	71,450
Liabilities relating to supplemental contracts	177
Life Insurance
Policyholder Account Balance [Roll Forward]
Balance, beginning of period	2,107	1,975
Acquisition from business combination		0
Issuances	26	36
Derecognition		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
Weighted-average crediting rate	5.00%	5.00%
Net amount at risk	$ 38,673	$ 38,365
Cash surrender value	$ 1,919	$ 1,796

Policyholder Account Balance, Business Combination

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Policyholder Account Balance, Derecognition

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Policyholder Account Balance, Excluding Embedded Derivatives

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Policyholder Account Balance, Supplemental Contracts

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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 guaranteed benefit in excess of current account balance of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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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 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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