Insurance Liabilities (Future Policy Benefits Information by Product) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 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	$ 31,442	$ 31,870
Future policy benefits	31,442		$ 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	2,742	2,808	2,758	$ 2,899
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	3,062	3,117	3,110	3,162
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			0	1
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			1	(7)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			3,111	3,156
Liability for Future Policy Benefit, Expected Net Premium, Issuance	5	24
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	28	28
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(82)	(91)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	(320)	(309)
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	5,235	5,213	5,245	5,385
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	5,827	5,834	5,908	5,905
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Model Refinements			1	1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			9	(5)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			5,918	5,901
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	6	25
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	53	54
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(150)	(146)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(592)	(621)
Liability for Future Policy Benefit, before Reinsurance	2,493	2,405
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	16	23
Future policy benefits	$ 2,477	$ 2,382
Liability for Future Policy Benefit, Weighted-Average Duration	7 years 6 months	8 years 9 months 18 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.91%	3.91%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.24%	5.24%
Liability for Future Policy Benefit, Gross Premium Income	$ 137	$ 139
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,599	5,889
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	4,164	4,449
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	7,898	8,055
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	5,827	5,834
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	3,773	3,683	3,728	3,719
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	4,119	4,030	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			(21)	4
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			4,100	3,997
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	79	98
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	40	38
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(100)	(103)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(346)	(347)
Liability for Future Policy Benefit, before Reinsurance	3,773	3,683
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	31	31
Future policy benefits	$ 3,742	$ 3,652
Liability for Future Policy Benefit, Weighted-Average Duration	7 years 10 months 24 days	8 years 2 months 12 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.06%	4.00%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate	5.31%	5.24%
Liability for Future Policy Benefit, Gross Premium Income	$ 104	$ 121
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	5,751	5,669
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	4,119	4,030
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	6,109	6,437	6,118	6,697
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	6,798	7,013	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			(19)	(2)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			$ 6,857	$ 7,083
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	74	77
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(133)	(147)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(689)	(576)
Liability for Future Policy Benefit, before Reinsurance	6,109	6,437
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	59	62
Future policy benefits	$ 6,050	$ 6,375
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	5.54%	5.32%
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	13,173	13,622
Liability for Future Policy Benefit, Expected Future Policy Benefit, Discounted, before Reinsurance	$ 6,798	$ 7,013