Other Financial Information (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid expenses	$ 456	$ 319
Income tax receivable	91	0
Materials, supplies and inventory	205	236
Contract assets	17	20
Other	5	5
Total other current assets	984	803
Other current assets, held for sale	63	59
Acquisition Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	111	123
Fulfillment Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	$ 99	$ 100