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Product Warranty and Related Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2016
Product Warranties Disclosures [Abstract] |
Schedule of policy, product warranty, recall campaigns and courtesy transportation [Table Text Block] |
| Three Months Ended |  | Six Months Ended
| June 30, 2016 |  | June 30, 2015 |  | June 30, 2016 |  | June 30, 2015
Warranty balance at beginning of period | $ | 9,233 |  |  | $ | 9,242 |  |  | $ | 9,279 |  |  | $ | 9,646 |
Warranties issued and assumed in period – recall campaigns and courtesy transportation | 220 |  |  | 203 |  |  | 374 |  |  | 386 |
Warranties issued and assumed in period – policy and product warranty | 663 |  |  | 604 |  |  | 1,212 |  |  | 1,166 |
Payments | (924 | ) |  | (1,032 | ) |  | (1,835 | ) |  | (2,106 | )
Adjustments to pre-existing warranties | 206 |  |  | 243 |  |  | 289 |  |  | 329 |
Effect of foreign currency and other | (32 | ) |  | 36 |  |  | 47 |  |  | (125 | )
Warranty balance at end of period | $ | 9,366 |  |  | $ | 9,296 |  |  | $ | 9,366 |  |  | $ | 9,296 |

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- Definition Table which summarizes the activity for policy, product warranty, recall campaigns and courtesy transportation for reporting periods. + References No definition available. + Details
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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