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Equity In Net Assets Of Nonconsolidated Affiliates (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) numberOfJointVenture | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |
Equity income | $ 1,301 | $ 674 | $ 1,268
Equity in net assets of nonconsolidated affiliates | 9,677 | 8,406 | 8,562
Basis Difference | $ 4,300 | 4,200 |
Number of joint ventures engaged in production, import and sale of products | numberOfJointVenture | 4 |  |
SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Number of interests in other joint ventures | numberOfJointVenture | 3 |  |
Automotive China |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity income | $ 1,098 | 512 | 1,132
Equity in net assets of nonconsolidated affiliates | 7,156 | 6,599 |
Other joint ventures |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity income | 203 | 162 | $ 136
Equity in net assets of nonconsolidated affiliates | $ 2,521 | $ 1,807 |
SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 50.00% | 50.00% |
SGM | SAIC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 50.00% |  |
PATAC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 50.00% | 50.00% |
SGMS |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 49.00% | 49.00% |
SGMW |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 44.00% | 44.00% |
Shanghai OnStar |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 40.00% | 40.00% |
Shanghai OnStar | SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 20.00% |  |
SGM Norsom |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 25.00% | 25.00% |
SGM Norsom | SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 50.00% |  |
SGM Norsom | SAIC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 25.00% |  |
SGM DY |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 25.00% | 25.00% |
SGM DY | SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 50.00% |  |
SGM DY | SAIC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 25.00% |  |
SGM DYPT |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 25.00% | 25.00% |
SGM DYPT | SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 50.00% |  |
SGM DYPT | SAIC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 25.00% |  |
SAIC-GMAC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 35.00% | 35.00% |
SAIC-GMAC | SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 20.00% |  |
SAIC-GMAC | Shanghai Automotive Group Finance Company Ltd. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 45.00% |  |
SAIC-GMF Leasing Co., Ltd. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 35.00% | 35.00% |
SAIC-GMF Leasing Co., Ltd. | SGM |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 20.00% |  |
SAIC-GMF Leasing Co., Ltd. | SAIC Financial Holdings Company |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 45.00% |  |

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