Financial Instruments - Non-Marketable Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		18 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Derivative [Line Items]
Payments to acquire convertible notes	$ 1,300				$ 5,300
Gain on conversion of notes	22	$ (4)	$ 3,285	$ (5)
Amount of additional investment	1,400		1,400
Fair value of convertible notes and amounts recorded for nonvoting preferred stock investments	15,100		15,100
Equity investments without readily determinable fair values	6,100		6,100		989
Equity method investments	1,200		1,200		1,200
Fair Value, Inputs, Level 3
Derivative [Line Items]
Fair value of convertible notes					13,800
Warrant | Level 2 assets
Derivative [Line Items]
Fair value of warrant assets	$ 2,600		$ 2,600		$ 2,700