Insurance Liabilities (Future Policy Benefits Information by Product) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, before Reinsurance	$ 31,588	$ 31,508
Future policy benefits	31,588		$ 31,085
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	2,681	2,750	2,758	$ 2,899
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	2,983	3,091	3,110	3,162
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			3	4
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(8)	13
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			3,105	3,179
Liability for Future Policy Benefit, Expected Net Premium, Issuance	8	41
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	54	55
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(184)	(184)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	(302)	(341)
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	5,192	5,097	5,245	5,385
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	5,747	5,785	5,908	5,905
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements			2	9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(10)	24
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			5,900	5,938
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	9	43
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	106	107
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(268)	(303)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(555)	(688)
Liability for Future Policy Benefit, before Reinsurance	2,511	2,347
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	17	20
Future policy benefits	$ 2,494	$ 2,327
Liability for Future Policy Benefit, Weighted-Average Duration	7 years 4 months 24 days	8 years 8 months 12 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.91%	3.92%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.15%	5.46%
Liability for Future Policy Benefit, Gross Premium Income	$ 264	$ 276
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,479	5,780
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	4,075	4,370
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	7,773	7,979
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	5,747	5,785
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	3,829	3,664	3,728	3,719
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	4,153	4,064	4,121	3,993
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			(27)	(2)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			4,094	3,991
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	183	196
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	79	76
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(203)	(199)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(324)	(400)
Liability for Future Policy Benefit, before Reinsurance	3,829	3,664
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	32	29
Future policy benefits	$ 3,797	$ 3,635
Liability for Future Policy Benefit, Weighted-Average Duration	7 years 9 months 18 days	8 years 1 month 6 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.09%	4.01%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.25%	5.46%
Liability for Future Policy Benefit, Gross Premium Income	$ 227	$ 242
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	5,790	5,712
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	4,153	4,064
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	6,053	6,225	6,118	6,697
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	6,731	6,946	6,876	7,085
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			(24)	(3)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			$ 6,852	$ 7,082
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	148	152
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(269)	(288)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(678)	(721)
Liability for Future Policy Benefit, before Reinsurance	6,053	6,225
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	59	61
Future policy benefits	$ 5,994	$ 6,164
Liability for Future Policy Benefit, Weighted-Average Duration	11 years 6 months	11 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.46%	4.46%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.54%	5.56%
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	13,031	13,483
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	$ 6,731	$ 6,946