Insurance Liabilities (Future Policy Benefits - SOP) (Details) - ULSG - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Additional Liability, Long-Duration Insurance [Line Items]
Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change	$ 8,966	$ 7,240	$ 7,607	$ 6,935
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Cash Flow and Reinsurance	9,124	7,587	7,784	7,175
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) from Cash Flow Change			895	52
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			102	75
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Reinsurance, after Cash Flow Change			$ 8,781	$ 7,302
Additional Liability, Long-Duration Insurance, Interest Income (Expense)	295	265
Additional Liability, Long-Duration Insurance, Net Premium Collected	328	309
Additional Liability, Long-Duration Insurance, Benefit Payment	(280)	(289)
AOCI, Liability for Future Policy Benefit, before Tax	(158)	(347)
Additional Liability, Long-Duration Insurance, Reinsurance Recoverable, after Allowance	1,521	1,409
Additional Liability, Long-Duration Insurance, after Reinsurance	$ 7,445	$ 5,831
Additional Liability, Long-Duration Insurance, Weighted-Average Duration	6 years 7 months 6 days	6 years 8 months 12 days
Additional Liability, Long-Duration Insurance, Weighted-Average Interest Accretion Rate	4.94%	4.92%
Additional Liability, Long-Duration Insurance, Gross Premium Income	$ 812	$ 798