Deferred Policy Acquisition Costs, Deferred Reinsurance, Deferred Sales Inducements and Value of Business Acquired (DRG) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance EOP	$ 694	$ 732
Retirement
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	67	62
Deferred reinsurance gain	2	1
Amortization	(1)	(1)
Foreign Currency Adjustment		2
Balance EOP	68	64
U.S. Legacy Products \| Annuities
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	263	287
Deferred reinsurance gain	0	0
Amortization	(6)	(6)
Foreign Currency Adjustment		0
Balance EOP	257	281
U.S. Legacy Products \| Guaranteed Universal Life
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	333	348
Deferred reinsurance gain	0	0
Amortization	(4)	(4)
Foreign Currency Adjustment		0
Balance EOP	329	344
Total
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	663	697
Deferred reinsurance gain	2	1
Amortization	(11)	(11)
Foreign Currency Adjustment		2
Balance EOP	654	689
Other businesses
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance EOP	$ 40	$ 43