Debt - Interest Expense and LT Debt Maturities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total interest expense	$ 3,868	$ 3,496	$ 4,121
2023	38,873
2024	21,262
2025	17,937
2026	7,878
2027	8,310
Thereafter	21,957
Total	116,217
Automotive
Debt Instrument [Line Items]
Automotive interest expense	987	950	1,098
2023	1,961
2024	118
2025	2,597
2026	61
2027	1,805
Thereafter	11,827
Total	18,369
GM Financial
Debt Instrument [Line Items]
Financing interest expense	2,881	$ 2,546	$ 3,023
2023	36,912
2024	21,144
2025	15,340
2026	7,817
2027	6,505
Thereafter	10,130
Total	$ 97,847

Interest Expense and Financing Interest Expense

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- Definition

Long-term Debt and Finance Lease Obligations, Maturities, Repayments of Principal after Year Five

+ References

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Long-term Debt and Finance Lease Obligations, Maturities, Repayments of Principal in Year Five

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- Definition

Long-term Debt and Finance Lease Obligations, Maturities, Repayments of Principal in Year Four

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Long-term Debt and Finance Lease Obligations, Maturities, Repayments of Principal in Year Three

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Long-term Debt and Finance Lease Obligations, Maturities, Repayments of Principal in Year Two

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- Definition

Long-term Debt and Finance Lease Obligations, Repayments of Principal in Next Twelve Months

+ References

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- Definition

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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- Definition

This element represents interest incurred for borrowed money which was used to produce goods or render services.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 220
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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
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Amount of long-term debt and lease obligation, including portion classified as current.

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