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Variable Interest Entities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Consolidated [Abstract]
GM Financial equipment on operating leases, net	$ 43,559		$ 42,882
GM Financial [Member]
Consolidated [Abstract]
GM Financial receivables, net of fees - current	26,850		20,521
GM Financial receivables, net of fees - non-current	25,083		21,208
GM Financial short-term debt and current portion of long-term debt	30,956	$ 24,437	24,450
GM Financial long-term debt	60,032		56,267
Consolidated VIE [Member] | GM Financial [Member]
Consolidated [Abstract]
Restricted cash - current	1,876		1,740
Restricted cash - non-current	504		527
GM Financial receivables, net of fees - current	18,304		15,141
GM Financial receivables, net of fees - non-current	14,008		12,944
GM Financial equipment on operating leases, net	21,781		22,222
GM Financial short-term debt and current portion of long-term debt	21,087		18,972
GM Financial long-term debt	$ 21,417		$ 20,356

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

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