Market Risk Benefits (Market Risk Benefits In Asset and Liability Positions) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	$ 2,430	$ 2,330	$ 2,188
MRB Liabilities	4,731	$ 4,623	4,859
Total
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	2,430		2,188
MRB Liabilities	4,731		4,859
Retirement
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	28		41
MRB Liabilities	482		305
Balance, EOP, net of reinsurance	454		264
U.S. Legacy Products \| Annuities
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	2,402		2,146
MRB Liabilities	4,242		4,529
Balance, EOP, net of reinsurance	1,840		2,383
Other businesses
Liability for Future Policy Benefit, Activity [Line Items]
MRB Assets	0		1
MRB Liabilities	7		25
Balance, EOP, net of reinsurance	7		24
Total
Liability for Future Policy Benefit, Activity [Line Items]
Balance, EOP, net of reinsurance	2,301		2,671
Total \| Total
Liability for Future Policy Benefit, Activity [Line Items]
Balance, EOP, net of reinsurance	$ 2,294		$ 2,647