Investments (Changes in Net Unrealized Investment Gains (Losses)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Unrealized investment gains (losses), beginning of year	$ (4,682)	$ (3,942)	$ (5,545)
Unrealized investment gains (losses) during the year	2,230	(1,218)	2,325
Unrealized investment gains (losses) relating to: Future policy benefits	(406)	281	(296)
Unrealized investment gains (losses) relating to: Deferred income tax benefit (expense)	(383)	197	(426)
Unrealized investment gains (losses), end of year	(3,241)	(4,682)	(3,942)
Change in net unrealized investment gains (losses)	$ 1,441	$ (740)	$ 1,603