Future Policy Benefits (Details) (Narrative) - Other Segments - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2022
Life Insurance Product Line [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Changes In Cash Flow Assumptions	$ 85	$ 269	$ 269
Future Policy Benefits Remeasurement Gain Loss After Reinsurance	(75)	(329)	(306)
Life Insurance Product Line [Member] | Americas [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Changes In Cash Flow Assumptions	17	130	130
Liability for Future Policy Benefit, after Reinsurance	8,599	8,777	8,777
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	(658)	(413)	(413)
Insurance, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Changes In Cash Flow Assumptions	78	3	3
Insurance, Other | Americas [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Changes In Cash Flow Assumptions	(22)	(3)	(3)
Liability for Future Policy Benefit, after Reinsurance	4,456	3,827	3,827
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	$ 0	$ 0	$ 0