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Other Financial Information - Other Current Assets, Net (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Prepaid Expenses and Other Current Assets [Abstract] |  |
Prepaid expenses | $ 411 | $ 372
Income tax receivable | 384 | 483
Materials, supplies and inventory | 124 | 146
Contract assets | 16 | 16
Assets held for sale | 24 | 24
Other | 17 | 22
Total other current assets, net | 1,197 | 1,274
Acquisition Costs |  |
Prepaid Expenses and Other Current Assets [Abstract] |  |
Contract costs | 104 | 102
Fulfillment Costs |  |
Prepaid Expenses and Other Current Assets [Abstract] |  |
Contract costs | $ 117 | $ 109

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