Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Transaction Type (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Investments [Abstract]
Sales	$ (245)	$ (90)	$ (382)	$ (201)
Credit losses	(4)	(16)	(80)	(131)
Valuation change of equity investments	170	18	53	88
Valuation change and settlements of derivatives	(65)	(15)	(84)	(23)
Net gains (losses) on investments and derivatives	$ (144)	$ (103)	$ (493)	$ (267)