Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Transaction Type (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments [Abstract]
Sales	$ (433)	$ (832)	$ 578
Credit losses	(99)	(54)	(42)
Valuation change of equity investments	316	(1,060)	499
Valuation change and settlements of derivatives	(84)	874	49
Net gains (losses) on investments and derivatives	$ (300)	$ (1,072)	$ 1,084