Insurance Liabilities (Future Policy Benefits - SOP) (Details) - ULSG - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Additional Liability, Long-Duration Insurance [Line Items]
Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change	$ 8,986	$ 7,607	$ 6,935	$ 7,168
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Cash Flow and Reinsurance	9,277	7,784	7,175	6,731
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) from Cash Flow Change		895	52	(37)
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		167	145	179
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Reinsurance, after Cash Flow Change		8,846	7,372	$ 6,873
Additional Liability, Long-Duration Insurance, Interest Income (Expense)	406	357	333
Additional Liability, Long-Duration Insurance, Net Premium Collected	446	414	416
Additional Liability, Long-Duration Insurance, Benefit Payment	(421)	(359)	(447)
AOCI, Liability for Future Policy Benefit, before Tax	(291)	(177)	(240)
Additional Liability, Long-Duration Insurance, Reinsurance Recoverable, after Allowance	1,535	1,438	1,384
Additional Liability, Long-Duration Insurance, after Reinsurance	$ 7,451	$ 6,169	$ 5,551
Additional Liability, Long-Duration Insurance, Weighted-Average Duration	6 years 7 months 6 days	6 years 8 months 12 days	6 years 8 months 12 days
Additional Liability, Long-Duration Insurance, Weighted-Average Interest Accretion Rate	4.94%	4.92%	4.90%
Additional Liability, Long-Duration Insurance, Gross Premium Income	$ 1,083	$ 1,064	$ 1,070