Other Financial Information (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid expenses	$ 410	$ 319
Materials, supplies and inventory	223	236
Contract assets	18	20
Other	10	5
Total other current assets	879	803
Other current assets, held for sale	70	59
Acquisition Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	118	123
Fulfillment Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	$ 100	$ 100