Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Transaction Type (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments [Abstract]
Sales	$ (160)	$ (433)	$ (832)
Credit losses	(146)	(99)	(54)
Valuation change of equity investments	95	316	(1,060)
Valuation change and settlements of derivatives	(14)	(84)	874
Net gains (losses) on investments and derivatives	$ (225)	$ (300)	$ (1,072)