Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Transaction Type (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Investments [Abstract]
Sales	$ (253)	$ (160)	$ (433)
Credit losses	(110)	(146)	(99)
Valuation change of equity investments	271	95	316
Valuation change and settlements of derivatives	(76)	(14)	(84)
Net gains (losses) on investments and derivatives	$ (168)	$ (225)	$ (300)