Investments and Fair Value Measurement - Investments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Marketable debt securities	$ 0	$ 1,180
Note receivable from a related party	132	83
Investments	11,806	9,052
Commercial paper
Marketable Securities [Line Items]
Marketable debt securities	0	457
U.S. government and agency securities
Marketable Securities [Line Items]
Marketable debt securities	0	429
Corporate bonds
Marketable Securities [Line Items]
Marketable debt securities	0	294
Didi
Marketable Securities [Line Items]
Non-marketable equity securities	0	6,299
Marketable equity securities	2,838	0
Grab
Marketable Securities [Line Items]
Non-marketable debt securities	0	2,341
Grab
Marketable Securities [Line Items]
Marketable equity securities	3,821	0
Aurora
Marketable Securities [Line Items]
Marketable equity securities	3,388	0
Other
Marketable Securities [Line Items]
Non-marketable equity securities	315	329
Marketable equity securities	$ 1,312	$ 0

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