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Restructuring And Other Initiatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 779	$ 520	$ 285	$ 352
Additions, interest accretion and other		1,831	522	216
Payments		(1,597)	(275)	(278)
Revisions to estimates and effect of foreign currency		25	(12)	(5)
Balance at end of period		779	520	285
Restructuring payments		1,597	275	278
Long-lived assets		80,903	77,950	$ 79,044
GMNA
Restructuring Reserve [Roll Forward]
Restructuring charges and other charges		569	511
Cruise
Restructuring Reserve [Roll Forward]
Restructuring charges and other charges		529
Employee separation charges		67
Non-cash pension curtailment and settlement charges		250
Business exit costs		212
Long-lived assets		1,400
Dealer Restructuring and Employee Separation Payments | GMNA
Restructuring Reserve [Roll Forward]
Payments		(674)	(120)
Restructuring payments		674	$ 120
Dealer Restructuring and Employee Separation Payments | GMNA | Forecast
Restructuring Reserve [Roll Forward]
Payments	(286)
Restructuring payments	286
Voluntary Separation Program | GMNA
Restructuring Reserve [Roll Forward]
Payments		(820)
Restructuring charges and other charges		1,000
Restructuring payments		820
Employee separation charges		905
Non-cash pension curtailment and settlement charges		$ 130
Voluntary Separation Program | GMNA | Forecast
Restructuring Reserve [Roll Forward]
Payments	(85)
Restructuring payments	$ 85

X

- Definition

Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost including foreign currency translation adjustments, excluding adjustments for costs incurred during the period and costs settled during the period.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of restructuring charges, remediation cost, and asset impairment loss.

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