Other Financial Information - Other Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid expenses	$ 395	$ 319
Income tax receivable	273	0
Materials, supplies and inventory	209	236
Contract assets	19	20
Other	14	5
Total other current assets	1,119	803
Disposal Group, Held-for-sale, Not Discontinued Operations | EMEA Business
Prepaid Expenses and Other Current Assets [Abstract]
Other current assets reclassified as held for sale		59
Acquisition Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	107	123
Fulfillment Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	$ 102	$ 100