Financial Instruments - Schedule of Investments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments	$ 8,759	$ 9,178
2028 Exchangeable Senior Notes \| Senior Note
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage of investment owned pledged as collateral	61.00%	48.00%
Related Party
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Note receivable from a related party	$ 0	$ 119
Didi \| Non-marketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Non-marketable equity securities	1,900	3,011
Other \| Non-marketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Non-marketable equity securities	2,263	1,455
Other \| Marketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Marketable equity securities	813	667
Grab \| Marketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Marketable equity securities	2,020	2,674
Aurora \| Marketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Marketable equity securities	$ 1,763	$ 1,252