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Variable Interest Entities (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
GM Financial equipment on operating leases, net	$ 44,128		$ 42,882
GM Financial [Member]
Variable Interest Entity [Line Items]
GM Financial receivables, net of fees – current	23,432		20,521
GM Financial receivables, net of fees – non-current	24,086		21,208
GM Financial short-term debt and current portion of long-term debt	27,950	$ 24,437	24,450
GM Financial long-term debt	58,427		56,267
Consolidated VIE [Member] | GM Financial [Member]
Variable Interest Entity [Line Items]
Restricted cash – current	1,733		1,740
Restricted cash – non-current	487		527
GM Financial receivables, net of fees – current	16,502		15,141
GM Financial receivables, net of fees – non-current	13,080		12,944
GM Financial equipment on operating leases, net	21,252		22,222
GM Financial short-term debt and current portion of long-term debt	19,086		18,972
GM Financial long-term debt	$ 20,392		$ 20,356

X

- Definition

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.

+ References

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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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.

+ References

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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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