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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Investments [Abstract]
Sales	$ (63)	$ (175)	$ (313)	$ (605)
Credit losses	(20)	(6)	(69)	(30)
Valuation change of equity investments	(34)	(285)	187	(1,421)
Valuation change and settlements of derivatives	31	299	(28)	889
Net gains (losses) on investments and derivatives	$ (86)	$ (167)	$ (223)	$ (1,167)