Insurance Liabilities (Liability for Future Policy Benefits - Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024
Additional Liability, Long-Duration Insurance [Line Items]
Mean Reversion Rate	0.0450	0.0400
ULSG liabilities, including liability for profits followed by losses (2)
Additional Liability, Long-Duration Insurance [Line Items]
Effect of changes in assumptions for ULSG liabilities, including the liability for profits followed by losses	$ (1,200)
Participating whole life insurance (3)
Additional Liability, Long-Duration Insurance [Line Items]
Participating Insurance, Percentage of Gross Insurance in Force	3.00%	3.00%
Participating Insurance, Percentage of Premium Income	38.00%	39.00%
Participating whole life insurance (3) | Minimum
Additional Liability, Long-Duration Insurance [Line Items]
Liability for Future Policy Benefits, Interest Rate	3.50%
Participating whole life insurance (3) | Maximum
Additional Liability, Long-Duration Insurance [Line Items]
Liability for Future Policy Benefits, Interest Rate	4.00%