Market Risk Benefits (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ 202	$ 229
Market Risk Benefit, Net Amount at Risk	217		$ 258
Insurance, Other | Americas [Member] | Other Segments
Market Risk Benefit [Line Items]
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	202	229	249	$ 247
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	210	245	$ 253	$ 263
Market Risk Benefit, Interest Expense	6	6
Market Risk Benefit, Attributed Fee Collected	13	13
Market Risk Benefit, Benefit Payment	0	(1)
Market Risk Benefit, Increase (Decrease) from Interest Rate Change	(34)	(2)
Market Risk Benefit, Increase (Decrease) from Equity Market Change	(26)	(34)
Market Risk Benefit, Increase (Decrease) from Volatility	0	(7)
Market Risk Benefit, Increase (Decrease) from Other Assumption	(9)	(2)
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected	7	9
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax	(8)	(16)
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	202	229
Market Risk Benefit, Reinsurance Recoverable, after Allowance	0	0
Market Risk Benefit, Net Amount at Risk	$ 1,302	$ 1,411
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	71 years	71 years