Accounting Changes and Error Corrections (Market Risk Benefits) (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ (229)	$ (271)
Insurance, Other | Americas [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Market Risk Benefit, Attributed Fee Collected	13	7
Market Risk Benefit, Benefit Payment	(1)	(4)
Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption	(2)	(66)
Market Risk Benefit, Increase (Decrease) from Interest Rate Change	(34)	46
Market Risk Benefit, Increase (Decrease) from Equity Market Change	(7)	12
Market Risk Benefit, Increase (Decrease) from Volatility	(2)	4
Market Risk Benefit, Increase (Decrease) from Other Assumption	9	12
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected	245	259
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	(229)	(271)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax	229	271
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	229	271	$ 247	$ 262
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	(16)	12	263	248
Market Risk Benefit, Interest Expense	6	0
Market Risk Benefit, Reinsurance Recoverable, after Allowance		$ 0
Accounting Standards Update 2018-12 | Insurance, Other | Americas [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Market Risk Benefit, Attributed Fee Collected			28	12
Market Risk Benefit, Benefit Payment			(9)	(14)
Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption			18	25
Market Risk Benefit, Increase (Decrease) from Interest Rate Change			(175)	(51)
Market Risk Benefit, Increase (Decrease) from Equity Market Change			48	(49)
Market Risk Benefit, Increase (Decrease) from Volatility			19	(2)
Market Risk Benefit, Increase (Decrease) from Other Assumption			7	5
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected			19	14
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk			247	262
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax			(16)	8
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change			247	262	$ 266	$ 266
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change			263	254	266	311
Market Risk Benefit, Interest Expense			54	3
Market Risk Benefit, Reinsurance Recoverable, after Allowance			$ 0	$ 0	$ 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Insurance, Other | Americas [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change						0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Insurance, Other | Americas [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change						$ 266