Variable Interest Entities (Details) - USD ($) $ in Millions |
Mar. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Consolidated [Abstract] | ||
| Restricted cash – current | $ 1,716 | $ 1,590 |
| Restricted cash – non-current | 639 | 583 |
| GM Financial [Member] | ||
| Consolidated [Abstract] | ||
| GM Financial receivables, net – current | 19,225 | 18,051 |
| GM Financial receivables, net – non-current | 19,145 | 18,500 |
| GM Financial equipment on operating leases, net | 24,538 | 20,172 |
| GM Financial short-term debt and current portion of long-term debt | 20,756 | 18,745 |
| GM Financial long-term debt | 39,615 | 35,601 |
| Consolidated VIE [Member] | GM Financial [Member] | ||
| Consolidated [Abstract] | ||
| Restricted cash – current | 1,478 | 1,345 |
| Restricted cash – non-current | 583 | 531 |
| GM Financial receivables, net – current | 12,567 | 12,224 |
| GM Financial receivables, net – non-current | 12,482 | 12,597 |
| GM Financial equipment on operating leases, net | 15,001 | 11,684 |
| GM Financial short-term debt and current portion of long-term debt | 14,703 | 13,545 |
| GM Financial long-term debt | $ 16,959 | $ 15,841 |