Insurance (Future Policy Benefits Information by Product) (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2022	Jan. 01, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 31,559	$ 33,065
Future policy benefits	31,559		$ 31,146	$ 39,830
Term and Whole Life Insurance
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	2,743	2,865	2,804	3,212			$ 3,274
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	3,060	3,058	3,146	2,964			2,868
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			0	121	$ 121	$ 0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change			0	(1)	159	100
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(8)	109	114	158
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			3,138	3,193	3,358	3,126
Liability for Future Policy Benefit, Expected Net Premium, Issuance	48	37	93	112
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	53	55	112	107
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(179)	(227)	(417)	(381)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	(317)	(193)	(342)	248
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	5,116	5,367	5,172	6,253			6,606
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	5,716	5,724	5,816	5,682			5,678
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cummulative Increase (Decrease) from Model Refinements	0	134	134	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change			0	0	179	100
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(9)	125	150	158
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			5,807	5,941	6,145	5,936
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	50	41	101	128
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	104	106	216	214
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(245)	(364)	(646)	(596)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(600)	(357)	(644)	571
Liability for Future Policy Benefit, before Reinsurance	2,373	2,502	2,368	3,041
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	28	36	32	42
Future policy benefits	$ 2,345	$ 2,466	2,336	2,999
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 3 months 18 days	8 years 4 months 24 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.92%	3.95%
Liability for Future Policy Benefit, Gross Premium Income	$ 300	$ 325
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	6,336	6,557
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	4,724	4,891
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	7,879	7,886
Income Annuities
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	0	0	0	0			0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	0	0	0	0			0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Issuance	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	0	0	0	0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	0	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	3,568	3,610	3,469	4,283			4,636
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	3,918	3,797	3,848	3,817			3,889
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cummulative Increase (Decrease) from Model Refinements	0	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change			0	0	55	(40)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			8	(10)	(21)	(6)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			3,856	3,807	3,851	3,843
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	179	100	220	193
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	72	72	144	149
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(189)	(182)	(367)	(368)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(350)	(187)	(379)	466
Liability for Future Policy Benefit, before Reinsurance	3,568	3,610	3,469	4,283
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	26	24	25	28
Future policy benefits	$ 3,542	$ 3,586	3,444	4,255
Liability for Future Policy Benefit, Weighted-Average Duration	8 years 4 months 24 days	8 years 4 months 24 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	3.93%	3.94%
Liability for Future Policy Benefit, Gross Premium Income	$ 214	$ 108
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	5,519	5,380
Structured Settlement and Pension Risk Transfer Annuities
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	0	0	0	0			0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	0	0	0	0			0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Model Refinements			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change			0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Issuance	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	0	0	0	0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	0	0	0	0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	0	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	6,711	7,775	6,793	10,171			11,301
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance	7,230	7,987	7,410	8,165			$ 8,531
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cummulative Increase (Decrease) from Model Refinements	0	0	(278)	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change			0	0	(157)	(41)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience			(37)	(37)	(23)	(16)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change			7,373	8,128	$ 7,707	$ 8,474
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	0	0	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	158	174	327	359
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	(301)	(315)	(624)	(668)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax	(519)	(212)	(617)	2,006
Liability for Future Policy Benefit, before Reinsurance	6,711	7,775	6,793	10,171
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	66	75	68	93
Future policy benefits	$ 6,645	$ 7,700	$ 6,725	$ 10,078
Liability for Future Policy Benefit, Weighted-Average Duration	11 years 7 months 6 days	12 years 8 months 12 days
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate	4.46%	4.44%
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	$ 14,062	$ 16,886