Other Financial Information (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid expenses	$ 371	$ 295
Income tax receivable	60	22
Materials, supplies and inventory	179	96
Contract assets	35	45
Note receivable	0	56
Receivable for sale of land	0	56
Other	14	11
Total other current assets	894	829
Other current assets, held for sale	52	126
Acquisition Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	131	142
Fulfillment Costs
Prepaid Expenses and Other Current Assets [Abstract]
Contract costs	$ 104	$ 106