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Schedule of Other Current Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Schedule Of Other Current Assets [Abstract] |  |
Prepaid expenses | $ 161 | $ 234
Sales and use tax | 147 | 173
Other | 148 | 141
Total other current assets | $ 456 | $ 548

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