Debt - Debt Carrying Amount and Fair Value (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
Mar. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Automotive
Debt Instrument [Line Items]
Finance lease liabilities	$ 364	$ 364	$ 383
Finance lease liabilities, Fair Value	375	375	391
Carrying Amount	15,640	15,640	15,467
Fair Value	15,025	15,025	15,204
Available under credit facility agreements	$ 13,838	$ 13,838	$ 13,793
Weighted-average interest rate on outstanding short-term debt	7.70%	7.70%	7.30%
Weighted-average interest rate on outstanding long-term debt	5.80%	5.80%	5.80%
Net discount and debt issuance costs	$ 445	$ 445	$ 439
Automotive \| Level 1
Debt Instrument [Line Items]
Fair Value	14,180	14,180	14,366
Automotive \| Level 2
Debt Instrument [Line Items]
Fair Value	845	845	838
GM Financial
Debt Instrument [Line Items]
Carrying Amount	117,037	117,037	114,264
Fair Value	117,532	117,532	115,010
GM Financial \| Level 2
Debt Instrument [Line Items]
Fair Value	115,350	115,350	112,941
GM Financial \| Level 3
Debt Instrument [Line Items]
Fair Value	2,182	2,182	2,070
Secured Debt \| Automotive
Debt Instrument [Line Items]
Carrying Amount	146	146	105
Fair Value	146	146	105
Secured Debt \| GM Financial
Debt Instrument [Line Items]
Carrying Amount	48,886	48,886	49,573
Fair Value	49,107	49,107	49,753
Unsecured Debt \| Automotive
Debt Instrument [Line Items]
Carrying Amount	15,130	15,130	14,980
Fair Value	14,504	14,504	14,709
Unsecured Debt \| GM Financial
Debt Instrument [Line Items]
Carrying Amount	68,152	68,152	64,691
Fair Value	$ 68,425	$ 68,425	$ 65,258
Unsecured Debt \| GM Financial \| $2.0 Billion Dollar Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Debt term	364 days	364 days
Aggregate borrowing capacity	$ 2,000	$ 2,000

Debt And Finance Lease Liabilities

No definition available.

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- Definition

Finance Lease Liabilities, Fair Value Disclosure

+ References

No definition available.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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