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Revenue - Additional Information (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Disaggregation Of Revenue [Line Items] |  |
Allowance for doubtful accounts receivable | $ 25 | $ 28
Contract liabilities | 24 | 19
Deferred revenue |  | 10
Increase in contract liabilities for net customer deposits | $ 15 |
Maximum [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Amortization period of revenue recognized | 1 year |
Contract Assets | $ 1 | $ 1

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