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Product Warranty and Related Liabilities (Notes) | 9 Months Ended
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Sep. 30, 2016
Product Warranties Disclosures [Abstract] |
Product Warranty and Related Liabilities [Text Block] | Product Warranty and Related Liabilities
| Three Months Ended |  | Nine Months Ended
| September 30, 2016 |  | September 30, 2015 |  | September 30, 2016 |  | September 30, 2015
Warranty balance at beginning of period | $ | 9,366 |  |  | $ | 9,296 |  |  | $ | 9,279 |  |  | $ | 9,646 |
Warranties issued and assumed in period – recall campaigns and courtesy transportation | 324 |  |  | 299 |  |  | 698 |  |  | 685 |
Warranties issued and assumed in period – policy and product warranty | 671 |  |  | 576 |  |  | 1,883 |  |  | 1,742 |
Payments | (947 | ) |  | (939 | ) |  | (2,782 | ) |  | (3,045 | )
Adjustments to pre-existing warranties | 95 |  |  | 132 |  |  | 384 |  |  | 461 |
Effect of foreign currency and other | 6 |  |  | (111 | ) |  | 53 |  |  | (236 | )
Warranty balance at end of period | $ | 9,515 |  |  | $ | 9,253 |  |  | $ | 9,515 |  |  | $ | 9,253 |

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- Definition The entire disclosure for standard product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantors aggregate product warranty liability for the reporting period. This disclosure excludes extended warranties. + References No definition available. + Details
Name: | gm_ProductWarrantyandRelatedLiabilitiesDisclosureTextBlock
Namespace Prefix: | gm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ProductWarrantiesDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration