Insurance Liabilities (Future Policy Benefits Information by Product) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, before Reinsurance	$ 31,085	$ 32,149
Future policy benefits	31,085	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	2,758	2,899	$ 2,804	$ 3,212
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	3,110	3,162	3,146	2,964
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements		4	0	121
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change		146	206	159
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		8	(17)	114
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change		3,320	3,335	3,358
Liability for Future Policy Benefit, Expected Net Premium, Issuance	67	93	93
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	110	108	112
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(387)	(374)	(417)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	(352)	(263)	(342)
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	5,245	5,385	5,172	6,253
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	5,908	5,905	5,816	5,682
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements		10	0	134
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		235	296	179
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(5)	(15)	150
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		6,145	6,097	6,145
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	72	99	101
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	213	211	216
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(522)	(502)	(646)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(663)	(520)	(644)
Liability for Future Policy Benefit, before Reinsurance	2,487	2,486	2,368
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	19	24	32
Future policy benefits	$ 2,468	$ 2,462	$ 2,336
Liability for Future Policy Benefit, Weighted-Average Duration	7 years 7 months 6 days	8 years 9 months 18 days	8 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.92%	3.91%	3.94%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.42%	4.94%	5.26%
Liability for Future Policy Benefit, Gross Premium Income	$ 563	$ 595	$ 625
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,714	5,999	6,535
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	4,244	4,535	4,875
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	8,031	8,148	8,015
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	5,908	5,905	5,816
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	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change		0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change		0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Issuance	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	0	0	0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	0	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	3,728	3,719	3,469	4,283
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	4,121	3,993	3,848	3,817
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements		0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		(23)	0	55
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		0	(21)	(21)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		3,970	3,827	3,851
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	400	369	220
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	148	139	144
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(397)	(342)	(367)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(393)	(274)	(379)
Liability for Future Policy Benefit, before Reinsurance	3,728	3,719	3,469
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	31	30	25
Future policy benefits	$ 3,697	$ 3,689	$ 3,444
Liability for Future Policy Benefit, Weighted-Average Duration	7 years 10 months 24 days	8 years 2 months 12 days	8 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.04%	3.99%	3.89%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.48%	4.95%	5.27%
Liability for Future Policy Benefit, Gross Premium Income	$ 485	$ 472	$ 243
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	0	0	0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	5,759	5,616	5,434
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	4,121	3,993	3,848
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	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change		0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change		0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Issuance	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	0	0	0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	0	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	6,118	6,697	6,793	10,171
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	6,876	7,085	7,410	8,165
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements		0	0	(278)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		82	0	(157)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(10)	(47)	(23)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		7,157	7,363	$ 7,707
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	305	314	327
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(586)	(592)	(624)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(758)	(388)	(617)
Liability for Future Policy Benefit, before Reinsurance	6,118	6,697	6,793
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	59	65	68
Future policy benefits	$ 6,059	$ 6,632	$ 6,725
Liability for Future Policy Benefit, Weighted-Average Duration	11 years 7 months 6 days	11 years 7 months 6 days	11 years 7 months 6 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.46%	4.46%	4.45%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.64%	5.03%	5.32%
Liability for Future Policy Benefit, Gross Premium Income	$ 0	$ 0	$ 0
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	0	0	0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	13,336	13,767	14,418
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	$ 6,876	$ 7,085	$ 7,410