Supplementary Information for Certain Balance Sheet Accounts - Deferred Revenue and Accrued Expenses (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable, accrued liabilities and deferred revenue	$ 962	$ 1,053
Accrued discretionary and incentive compensation	588	835
Accrued vacation	202	154
Accrued 401(k) contributions	43	63
Other employee-related liabilities	73	106
Total deferred revenue and accrued expenses	$ 1,868	$ 2,211