Financial Instruments - Available-for-sale Marketable Securities (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Marketable Securities [Line Items]
Less than 12 months, fair value	$ 51,395	$ 2,721
Less than 12 months, unrealized losses	(155)	(3)
12 months or greater, fair value	811	3,129
12 months or greater, unrealized losses	(8)	(38)
Fair value	52,206	5,850
Unrealized losses	(163)	(41)
U.S. government securities
Marketable Securities [Line Items]
Less than 12 months, fair value	38,575	1,491
Less than 12 months, unrealized losses	(107)	(2)
12 months or greater, fair value	212	1,570
12 months or greater, unrealized losses	(3)	(18)
Fair value	38,787	3,061
Unrealized losses	(110)	(20)
U.S. government agency securities
Marketable Securities [Line Items]
Less than 12 months, fair value	407	17
Less than 12 months, unrealized losses	(3)	0
12 months or greater, fair value	25	25
12 months or greater, unrealized losses	0	0
Fair value	432	42
Unrealized losses	(3)	0
Corporate debt securities
Marketable Securities [Line Items]
Less than 12 months, fair value	12,413	1,213
Less than 12 months, unrealized losses	(45)	(1)
12 months or greater, fair value	574	1,534
12 months or greater, unrealized losses	(5)	(20)
Fair value	12,987	2,747
Unrealized losses	$ (50)	$ (21)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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