Insurance Liabilities (Future Policy Benefits Information by Product) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, before Reinsurance	$ 32,149	$ 31,146
Future policy benefits	32,149	31,146	$ 39,830
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	2,899	2,804	3,212	$ 3,274
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	3,162	3,146	2,964	2,868
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements		0	121	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change		206	159	100
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(17)	114	158
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change		3,335	3,358	3,126
Liability for Future Policy Benefit, Expected Net Premium, Issuance	93	93	112
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	108	112	107
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(374)	(417)	(381)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	(263)	(342)	248
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	5,385	5,172	6,253	6,606
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	5,905	5,816	5,682	5,678
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements		0	134	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		296	179	100
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(15)	150	158
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		6,097	6,145	5,936
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	99	101	128
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	211	216	214
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(502)	(646)	(596)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(520)	(644)	571
Liability for Future Policy Benefit, before Reinsurance	2,486	2,368	3,041
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	24	32	42
Future policy benefits	$ 2,462	$ 2,336	$ 2,999
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 9 months 18 days	8 years 6 months	8 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.91%	3.94%	3.94%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	4.94%	5.26%	2.53%
Liability for Future Policy Benefit, Gross Premium Income	$ 595	$ 625	$ 648
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,999	6,535	6,736
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	4,535	4,875	5,014
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	8,148	8,015	7,877
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	5,905	5,816	5,682
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	3,719	3,469	4,283	4,636
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	3,993	3,848	3,817	3,889
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		0	55	(40)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(21)	(21)	(6)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		3,827	3,851	3,843
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	369	220	193
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	139	144	149
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(342)	(367)	(368)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(274)	(379)	466
Liability for Future Policy Benefit, before Reinsurance	3,719	3,469	4,283
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	30	25	28
Future policy benefits	$ 3,689	$ 3,444	$ 4,255
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 2 months 12 days	8 years 6 months	8 years 6 months
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.99%	3.89%	3.98%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	4.95%	5.27%	2.55%
Liability for Future Policy Benefit, Gross Premium Income	$ 472	$ 243	$ 240
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	5,616	5,434	5,446
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	3,993	3,848	3,817
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	6,697	6,793	10,171	11,301
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	7,085	7,410	8,165	8,531
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements		0	(278)	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		0	(157)	(41)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience		(47)	(23)	(16)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change		7,363	7,707	$ 8,474
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	314	327	359
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(592)	(624)	(668)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(388)	(617)	2,006
Liability for Future Policy Benefit, before Reinsurance	6,697	6,793	10,171
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	65	68	93
Future policy benefits	$ 6,632	$ 6,725	$ 10,078
Liability for Future Policy Benefit, Weighted-Average Duration	11 years 7 months 6 days	11 years 7 months 6 days	12 years 8 months 12 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.46%	4.45%	4.45%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.03%	5.32%	2.81%
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	13,767	14,418	17,241
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	$ 7,085	$ 7,410	$ 8,165