Cash, Cash Equivalents, Marketable Securities, and Restricted Cash - Available-for-Sale Marketable Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Less than 12 months, fair value	$ 10,087	$ 20,254
Less than 12 months, unrealized losses	(500)	(192)
12 months or greater, fair value	15,170	72
12 months or greater, unrealized losses	(1,189)	(1)
Fair value	25,257	20,326
Unrealized losses	(1,689)	(193)
U.S. government securities
Marketable Securities [Line Items]
Less than 12 months, fair value	5,008	5,184
Less than 12 months, unrealized losses	(234)	(38)
12 months or greater, fair value	3,499	30
12 months or greater, unrealized losses	(247)	0
Fair value	8,507	5,214
Unrealized losses	(481)	(38)
U.S. government agency securities
Marketable Securities [Line Items]
Less than 12 months, fair value	524	5,029
Less than 12 months, unrealized losses	(17)	(61)
12 months or greater, fair value	4,415	2
12 months or greater, unrealized losses	(308)	0
Fair value	4,939	5,031
Unrealized losses	(325)	(61)
Corporate debt securities
Marketable Securities [Line Items]
Less than 12 months, fair value	4,555	10,041
Less than 12 months, unrealized losses	(249)	(93)
12 months or greater, fair value	7,256	40
12 months or greater, unrealized losses	(634)	(1)
Fair value	11,811	10,081
Unrealized losses	$ (883)	$ (94)

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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