Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Transaction Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments [Abstract]
Sales	$ 116	$ (63)	$ (85)	$ (313)
Credit losses	(12)	(20)	(143)	(69)
Valuation change of equity investments	119	(34)	207	187
Valuation change and settlements of derivatives	20	31	(3)	(28)
Net gains (losses) on investments and derivatives	$ 243	$ (86)	$ (24)	$ (223)