Investments (Net Investment Income - Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Net investment income	$ 5,139	$ 5,100	$ 4,560
Trading securities
Net Investment Income [Line Items]
Investment gains (losses) on trading securities still held	(1)	0	0
Other limited partnership interests
Net Investment Income [Line Items]
Net investment income	$ 332	$ 367	$ 186