Policyholder Account Balances - Schedule of Changes in Policyholder Account Balance (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Policyholder Account Balance [Roll Forward]
Beginning balance			$ 13,843
Net transfers from (to) separate accounts			4		$ 2
Interest credited	$ 96	$ 94	191	$ 193
Ending balance	13,895		13,895		13,843
Life insurance
Policyholder Account Balance [Roll Forward]
Beginning balance			6,993	7,235	7,235
Issuances			0		0
Premiums received			215		447
Policy charges			(283)		(582)
Surrenders and withdrawals			(58)		(152)
Benefit payments			(65)		(243)
Net transfers from (to) separate accounts			0		0
Interest credited			148		297
Other			2		(9)
Ending balance	$ 6,952		$ 6,952		$ 6,993
Weighted-average crediting rate	3.90%		3.90%		3.90%
Net amount at risk	$ 38,636		$ 38,636		$ 39,712
Cash surrender value	3,951		3,951		4,021
Fixed annuities
Policyholder Account Balance [Roll Forward]
Beginning balance			3,278	3,789	3,789
Issuances			0		0
Premiums received			9		16
Policy charges			(2)		(5)
Surrenders and withdrawals			(151)		(373)
Benefit payments			(133)		(304)
Net transfers from (to) separate accounts			0		0
Interest credited			56		125
Other			14		30
Ending balance	$ 3,071		$ 3,071		$ 3,278
Weighted-average crediting rate	3.00%		3.00%		3.00%
Net amount at risk	$ 30		$ 30		$ 34
Cash surrender value	2,314		2,314		2,490
Variable annuities
Policyholder Account Balance [Roll Forward]
Beginning balance			420	$ 467	467
Issuances			0		0
Premiums received			7		13
Policy charges			(3)		(5)
Surrenders and withdrawals			(20)		(44)
Benefit payments			(24)		(60)
Net transfers from (to) separate accounts			4		2
Interest credited			2		4
Other			13		43
Ending balance	$ 399		$ 399		$ 420
Weighted-average crediting rate	3.30%		3.30%		3.30%
Net amount at risk	$ 322		$ 322		$ 354
Cash surrender value	$ 399		$ 399		$ 420

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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Amount of transfer to (from) liability for policyholder account balance (to) from liability for separate account.

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