Future Contract Benefits - Summary of Discounted and Undiscounted Expected Future Gross Premiums and Expected Future Benefit Payments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Payout Annuities
Undiscounted
Expected future gross premiums	$ 0	$ 0
Expected future benefit payments	3,428	3,483
Discounted
Expected future gross premiums	0	0
Expected future benefit payments	2,009	2,085
Traditional Life
Undiscounted
Expected future gross premiums	14,025	14,015
Expected future benefit payments	14,319	13,894
Discounted
Expected future gross premiums	9,471	9,815
Expected future benefit payments	$ 9,647	10,041
Traditional Life \| Revision of Prior Period, Adjustment
Undiscounted
Expected future benefit payments		$ 681

Liability For Future Policy Benefit, Discounted, Befiore Reinsurance

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Liability for future policy benefit, expected future policy benefit, discounted, before reinsurance.

+ References

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- Definition

Liability For Future Policy Benefit, Undiscounted, Befiore Reinsurance

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Amount, before effect of reinsurance, of discounted balance for expected future gross premium component of liability for future policy benefit.

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- Definition

Amount, before effect of reinsurance, of undiscounted balance for expected future gross premium component of liability for future policy benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480046/944-40-55-29E

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- Definition

Amount, before effect of reinsurance, of undiscounted balance for expected future policy benefit and expense component of liability for future policy benefit.

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