Product Warranty and Related Liabilities (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Product Warranty and Related Liabilities [Roll Forward] | ||
| Warranty balance at beginning of period | $ 9,701 | $ 9,279 |
| Warranties issued and assumed in period – recall campaigns | 184 | 154 |
| Warranties issued and assumed in period – product warranty | 613 | 549 |
| Payments | (897) | (911) |
| Adjustments to pre-existing warranties | 36 | 83 |
| Effect of foreign currency and other | 43 | 79 |
| Warranty balance at end of period | $ 9,680 | $ 9,233 |