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Debt - Secured Debt and Unsecured Debt (Details) $ in Billions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 30, 2023 USD ($) loan | Oct. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Feb. 28, 2023 USD ($) | Dec. 31, 2022
Unsecured Debt | Delayed Draw Term Loan Credit Agreement |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt term | 364 days |  |  |  |  |
Aggregate borrowing capacity | $ 3.0 |  |  |  |  |
Number of loan | loan | 4 |  |  |  |  |
Automotive |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Weighted-average interest rate on outstanding long-term debt |  |  |  | 5.80% |  | 5.80%
Revolving Credit Facility | GM Financial | Unsecured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Weighted-average interest rate |  |  |  | 7.82% |  |
Maximum | Revolving Credit Facility | GM Financial | Unsecured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt term |  |  |  | 5 years |  |
Senior Notes | Unsecured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amount of debt issued |  |  | $ 1.5 |  |  |
Weighted-average interest rate |  |  | 4.875% |  |  |
Senior Notes | GM Financial | Unsecured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amount of debt issued |  |  |  | $ 11.4 |  |
Weighted-average interest rate |  |  |  | 5.70% |  |
Weighted-average interest rate on outstanding long-term debt |  |  |  | 3.82% |  |
Line of Credit | Unsecured Debt | Five Year Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate borrowing capacity |  |  | $ 10.0 |  | $ 11.2 |
Line of Credit | Unsecured Debt | Three Year Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate borrowing capacity |  |  | $ 4.1 |  | $ 4.3 |
Line of Credit | Unsecured Debt | $6.0 Billion Dollar Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt term |  | 364 days |  |  |  |
Aggregate borrowing capacity |  | $ 6.0 |  |  |  |
Line of Credit | GM Financial | Unsecured Debt | $2.0 Billion Dollar Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt term |  |  | 364 days | 364 days |  |
Aggregate borrowing capacity |  |  | $ 2.0 | $ 2.0 |  |
Line of Credit | GM Financial | Unsecured Debt | Five Year Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt term |  |  | 5 years |  |  |
Line of Credit | GM Financial | Unsecured Debt | Three Year Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt term |  |  | 3 years |  |  |
Line of Credit | Revolving Credit Facility | GM Financial | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Increase to maximum borrowing capacity |  |  |  | 20.8 |  |
Notes Payable, Other Payables | GM Financial | Secured Debt | Securitization notes payable |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Amount of debt issued |  |  |  | $ 23.6 |  |
Weighted-average interest rate |  |  |  | 5.60% |  |
Weighted-average interest rate on outstanding long-term debt |  |  |  | 5.32% |  |

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