Inventories, Net - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Inventory [Line Items] | |||
| General and administrative costs included in work-in-process inventories | $ 529 | $ 565 | |
| General and administrative costs incurred and recorded in inventories | 3,300 | 2,700 | $ 2,500 |
| General and administrative costs charged to cost of sales from inventories | $ 3,300 | $ 2,800 | $ 2,500 |