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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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