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Business and Summary of Significant Accounting Policies - Management Estimates (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Change in total benefits and other changes in policy reserves (decrease) increase	$ 99	$ 89	$ 73

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- Definition

Policyholder Benefits And Claims Incurred, Net, Life and Annuity, Change In Policy Reserves, Increase (Decrease)

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No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

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