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Other Financial Information (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Prepaid Expenses and Other Current Assets [Abstract] |  |
Prepaid expenses | $ 405 | $ 295
Income tax receivable | 28 | 22
Materials, supplies and inventory | 151 | 96
Contract assets | 41 | 45
Note receivable | 0 | 56
Receivable for sale of land | 0 | 56
Other | 16 | 11
Total other current assets | 881 | 829
Other current assets, held for sale | 121 | 126
Acquisition Costs |  |
Prepaid Expenses and Other Current Assets [Abstract] |  |
Contract costs | 134 | 142
Fulfillment Costs |  |
Prepaid Expenses and Other Current Assets [Abstract] |  |
Contract costs | $ 106 | $ 106

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