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Equipment on Operating Leases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Lessor, Lease, Description [Line Items]
Residual value of leased asset	$ 29,600		$ 29,600		$ 29,200
Vehicles
Lessor, Lease, Description [Line Items]
Equipment on operating leases	49,263		49,263		50,000
Less: accumulated depreciation	(9,606)		(9,606)		(10,181)
Equipment on operating leases, net	39,657		39,657		$ 39,819
Depreciation expense	1,600	$ 1,800	4,800	$ 5,500
Vehicles | GM Financial
Lessor Operating Lease Payments to be Received
2021	1,660		1,660
2022	5,369		5,369
2023	3,129		3,129
2024	870		870
2025	60		60
Thereafter	0		0
Total	$ 11,088		$ 11,088

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of lease payments to be received by lessor for operating lease.

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Amount of lease payment to be received by lessor for operating lease in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lease payment to be received by lessor for operating lease in remainder of current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of residual asset covered by residual value guarantee under operating lease. Excludes guarantee considered to be lease payments for lessor.

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Amount of lessee's right to use underlying asset under operating lease.

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