Inventory - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Inventory [Line Items] | ||||
| Inventory write-downs | $ 140 | $ 167 | ||
| Cost of Revenues [Member] | ||||
| Inventory [Line Items] | ||||
| Inventory write-downs | $ 26 | $ 24 | $ 108 | $ 113 |