Investments and Fair Value Measurement - Investments (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Marketable Securities [Line Items]
Short-term investments	$ 528	$ 1,084
Restricted investments	8,874	7,019
Investments	$ 9,178	8,460
Exchangeable Note \| 2028 Exchangeable Senior Notes
Marketable Securities [Line Items]
Percentage of investment owned pledged as collateral	48.00%
Related Party
Marketable Securities [Line Items]
Note receivable from a related party	$ 119	144
U.S. government and agency securities
Marketable Securities [Line Items]
Short-term investments	149	167
Restricted investments	6,830	5,552
Commercial paper
Marketable Securities [Line Items]
Short-term investments	75	220
Restricted investments	87	179
Corporate bonds
Marketable Securities [Line Items]
Short-term investments	271	659
Restricted investments	1,897	1,288
Certificates of deposit
Marketable Securities [Line Items]
Short-term investments	33	38
Restricted investments	38	0
Mortgage-backed and asset-backed securities
Marketable Securities [Line Items]
Restricted investments	22	0
Non-marketable equity securities \| Didi
Marketable Securities [Line Items]
Non-marketable equity securities	3,011	2,602
Non-marketable equity securities \| Other
Marketable Securities [Line Items]
Non-marketable equity securities	1,455	608
Marketable equity securities \| Other
Marketable Securities [Line Items]
Marketable equity securities	667	523
Marketable equity securities \| Grab
Marketable Securities [Line Items]
Marketable equity securities	2,674	2,529
Marketable equity securities \| Aurora
Marketable Securities [Line Items]
Marketable equity securities	$ 1,252	$ 2,054

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