Investments - Unrealized Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments [Abstract]
Net gains (losses) recognized during the period on equity investments	$ (246)	$ (1,116)	$ (85)	$ (3,293)
Less: Net gains (losses) recognized during the period on equity investments sold during the period	0	(68)	0	(242)
Total unrealized gains (losses) on equity investments held, end of period	$ (246)	$ (1,048)	$ (85)	$ (3,051)