Investments and Fair Value Measurement - Investments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Short-term investments	$ 1,795	$ 727
Restricted investments	5,061	4,779
Investments	6,203	6,101
Related Party
Marketable Securities [Line Items]
Note receivable from a related party	127	126
U.S. government and agency securities
Marketable Securities [Line Items]
Short-term investments	437	253
Restricted investments	4,783	4,426
Commercial paper
Marketable Securities [Line Items]
Short-term investments	581	288
Restricted investments	15	17
Corporate bonds
Marketable Securities [Line Items]
Short-term investments	770	181
Restricted investments	165	77
Certificates of deposit
Marketable Securities [Line Items]
Short-term investments	7	5
Restricted investments	98	259
Didi
Marketable Securities [Line Items]
Non-marketable equity securities:	2,354	2,245
Grab
Marketable Securities [Line Items]
Marketable equity securities:	1,902	1,806
Aurora
Marketable Securities [Line Items]
Marketable equity securities:	903	1,425
Other
Marketable Securities [Line Items]
Non-marketable equity securities:	575	329
Marketable equity securities:	$ 342	$ 170

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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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