Market Risk Benefits (Market Risk Benefits In Asset and Liability Positions) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	$ 2,166	$ 2,330	$ 2,139
MRB Liabilities	5,000	$ 4,623	5,021
Total
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	2,166		2,139
MRB Liabilities	5,000		5,021
Retirement
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	34		31
MRB Liabilities	401		169
Balance, EOP, net of reinsurance	367		138
U.S. Legacy Products \| Annuities
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	2,132		2,106
MRB Liabilities	4,587		4,823
Balance, EOP, net of reinsurance	2,455		2,717
Other businesses
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	0		2
MRB Liabilities	12		29
Balance, EOP, net of reinsurance	12		27
Total
Liability for Future Policy Benefit, Activity [Line Items]
Balance, EOP, net of reinsurance	2,834		2,882
Total \| Total
Liability for Future Policy Benefit, Activity [Line Items]
Balance, EOP, net of reinsurance	$ 2,822		$ 2,855