Deferred Policy Acquisition Costs, Deferred Reinsurance, Deferred Sales Inducements and Value of Business Acquired (DRG) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance EOP	$ 689	$ 726
Retirement
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	67	62
Deferred reinsurance gain	7	2
Amortization	(2)	(2)
Foreign Currency Adjustment	1	6
Balance EOP	73	68
U.S. Legacy Products \| Annuities
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	263	287
Deferred reinsurance gain	0	0
Amortization	(11)	(12)
Foreign Currency Adjustment	0	0
Balance EOP	252	275
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	(8)	(8)
Foreign Currency Adjustment	0	0
Balance EOP	325	340
Total
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance BOP	663	697
Deferred reinsurance gain	7	2
Amortization	(21)	(22)
Foreign Currency Adjustment	1	6
Balance EOP	650	683
Other businesses
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance EOP	$ 39	$ 43