Insurance (Future Policy Benefits - SOP) (Details) - ULSG - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Additional Liability, Long-Duration Insurance [Line Items]
Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change	$ 7,210	$ 6,868	$ 6,935	$ 7,168
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Cash Flow and Reinsurance	7,421	6,966	7,175	6,731
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) from Cash Flow Change			0	0
Additional Liability, Long-Duration Insurance, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			60	108
Additional Liability, Long-Duration Insurance, Original Discount Rate, before Reinsurance, after Cash Flow Change			$ 7,235	$ 6,839
Additional Liability, Long-Duration Insurance, Interest Income (Expense)	175	164
Additional Liability, Long-Duration Insurance, Net Premium Collected	206	231
Additional Liability, Long-Duration Insurance, Benefit Payment	(195)	(268)
Additional Liability, Long-Duration Insurance, Remeasurement Gain (Loss)	0	0
AOCI, Liability for Future Policy Benefit, before Tax	(211)	(98)
Additional Liability, Long-Duration Insurance, Reinsurance Recoverable, after Allowance	1,414	1,354
Additional Liability, Long-Duration Insurance, after Reinsurance	$ 5,796	$ 5,514
Additional Liability, Long-Duration Insurance, Weighted-Average Duration	6 years 8 months 12 days	6 years 8 months 12 days
Additional Liability, Long-Duration Insurance, Weighted-Average Interest Accretion Rate	4.91%	4.91%
Additional Liability, Long-Duration Insurance, Gross Premium Income	$ 0	$ 0