Insurance Liabilities (Future Policy Benefits Information by Product) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, before Reinsurance	$ 31,508	$ 31,559
Future policy benefits	31,508		$ 32,149
Term and Whole Life Insurance
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	2,750	2,743	2,899	$ 2,804
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	3,091	3,060	3,162	3,146
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			4	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			13	(8)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			3,179	3,138
Liability for Future Policy Benefit, Expected Net Premium, Issuance	41	48
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	55	53
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(184)	(179)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	(341)	(317)
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	5,097	5,116	5,385	5,172
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	5,785	5,716	5,905	5,816
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements			9	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			24	(9)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			5,938	5,807
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	43	50
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	107	104
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(303)	(245)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(688)	(600)
Liability for Future Policy Benefit, before Reinsurance	2,347	2,373
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	20	28
Future policy benefits	$ 2,327	$ 2,345
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 8 months 12 days	8 years 3 months 18 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.92%	3.92%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.46%	5.18%
Liability for Future Policy Benefit, Gross Premium Income	$ 276	$ 300
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,780	6,336
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	4,370	4,724
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	7,979	7,879
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	5,785	5,716
Income Annuities
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			0	0
Liability for Future Policy Benefit, Expected Net Premium, Issuance	0	0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	0	0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	0	0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	3,664	3,568	3,719	3,469
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	4,064	3,918	3,993	3,848
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(2)	8
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			3,991	3,856
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	196	179
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	76	72
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(199)	(189)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(400)	(350)
Liability for Future Policy Benefit, before Reinsurance	3,664	3,568
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	29	26
Future policy benefits	$ 3,635	$ 3,542
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 1 month 6 days	8 years 4 months 24 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.01%	3.93%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.46%	5.19%
Liability for Future Policy Benefit, Gross Premium Income	$ 242	$ 214
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	0	0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	5,712	5,519
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	4,064	3,918
Structured Settlement and Pension Risk Transfer Annuities
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			0	0
Liability for Future Policy Benefit, Expected Net Premium, Issuance	0	0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	0	0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	0	0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	6,225	6,711	6,697	6,793
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	6,946	7,230	7,085	7,410
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(3)	(37)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			$ 7,082	$ 7,373
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	152	158
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(288)	(301)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(721)	(519)
Liability for Future Policy Benefit, before Reinsurance	6,225	6,711
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	61	66
Future policy benefits	$ 6,164	$ 6,645
Liability for Future Policy Benefit, Weighted-Average Duration	11 years 6 months	11 years 7 months 6 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.46%	4.46%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.56%	5.20%
Liability for Future Policy Benefit, Gross Premium Income	$ 0	$ 0
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	0	0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	13,483	14,062
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	$ 6,946	$ 7,230