Investments - Schedule of Available-For-Sale Investments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 13,415	$ 8,525
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair values	13,415	8,525
U.S. Treasury bills
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,493	998
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair values	2,493	998
Money market mutual funds
Debt Securities, Available-for-sale [Line Items]
Amortized cost	10,793	7,395
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair values	10,793	7,395
Other short-term interest-bearing securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	129	132
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair values	$ 129	$ 132

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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