Supplemental Financial Information - Other current liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued compensation and benefits	$ 500	$ 467
Customer Funds	280	432
Income taxes payable	170	296
Dividend payable	261	219
Other Accrued Liabilities, Current	644	652
Other Liabilities, Current	1,855	2,066
Reclassification [Line Items]
Accounts payable	1,164	1,185
Other current liabilities	$ 1,855	2,066
As reported
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Liabilities, Current		1,634
Reclassification [Line Items]
Accounts payable		1,617
Other current liabilities		1,634
Reclassification, Other
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Liabilities, Current		432
Reclassification [Line Items]
Accounts payable		(432)
Other current liabilities		$ 432