Supplementary Information for Certain Balance Sheet Accounts - Deferred Revenue and Accrued Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable, accrued liabilities and deferred income	$ 1,073	$ 975
Accrued discretionary and incentive compensation	795	708
Accrued vacation	150	142
Other employee-related liabilities	86	90
Total deferred revenue and accrued expenses	$ 2,104	$ 1,915