Investments (Net Unrealized Investment Gains (Losses)) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Components of net unrealized investment gains (losses) included in accumulated other comprehensive loss
Fixed maturity securities	$ (4,885)	$ (7,357)	$ (6,023)
Derivatives	219	460	344
Other	(8)	(7)	(7)
Subtotal	(4,674)	(6,904)	(5,686)
Amounts allocated from: Future policy benefits	571	977	696
Deferred income tax benefit (expense)	862	1,245	1,048
Net unrealized investment gains (losses)	$ (3,241)	$ (4,682)	$ (3,942)