Financial Instruments - Equity Warrants and Non-Marketable Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Sep. 30, 2023	Dec. 31, 2023
Derivative [Line Items]
Equity investments without readily determinable fair values	$ 801		$ 754
Payments to acquire nonmarketable securities	2,750	$ 1,250
Warrant | Level 2 assets
Derivative [Line Items]
Fair value of warrant assets	$ 2,100		$ 2,200