Fair Value Measurement (Details) - Level 1 - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Money market trust
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 2,262	$ 1,755
Restricted cash	90	83
Money market fund
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 548	$ 828