Insurance Liabilities (Future Policy Benefits - Reconciliation) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 31,682	$ 31,085
Liabilities reported in the preceding rollforward tables
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	22,555	21,319
Long-term care insurance (1)
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	5,203	5,190
ULSG liabilities, including liability for profits followed by losses (2)
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	57	875
Participating whole life insurance (3)
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	3,054	2,969
Deferred profit liabilities
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	452	428
Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 361	$ 304