XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.21.2

Equity In Net Assets of Nonconsolidated Affiliates (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Equity Income |
| Three Months Ended |  | Nine Months Ended
| September 30, 2021 |  | September 30, 2020 |  | September 30, 2021 |  | September 30, 2020
Automotive China equity income | $ | 270 |  |  | $ | 262 |  |  | $ | 854 |  |  | $ | 264 |
Other joint ventures equity income | 53 |  |  | 47 |  |  | 161 |  |  | 125 |
Total Equity income | $ | 323 |  |  | $ | 309 |  |  | $ | 1,015 |  |  | $ | 389 |
Summarized Financial Data for Nonconsolidated Affiliates |
| Three Months Ended |  | Nine Months Ended
| September 30, 2021 |  | September 30, 2020 |  | September 30, 2021 |  | September 30, 2020
Summarized Operating Data of Automotive China JVs |  |  |  |  |  |  |
Automotive China JVs' net sales | $ | 10,321 |  |  | $ | 11,029 |  |  | $ | 29,150 |  |  | $ | 24,589 |
Automotive China JVs' net income | $ | 546 |  |  | $ | 535 |  |  | $ | 1,659 |  |  | $ | 749 |

X
- Definition Tabular disclosure of the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied including gain (loss) on disposition of interest in nonconsolidated affiliates. + References No definition available. + Details
Name: | gm_ScheduleOfEquityIncomeTableTextBlock
Namespace Prefix: | gm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of aggregated summarized financial data for equity-method investees for the reporting period, including but not limited to, balance sheet, income statements etc. + References No definition available. + Details
Name: | gm_SummarizedFinancialDataofEquityMethodInvesteesTableTextBlock
Namespace Prefix: | gm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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