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Variable Interest Entities (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
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Variable Interest Entity [Line Items] |  |
GM Financial equipment on operating leases, net | $ 37,969 | $ 38,758
GM Financial [Member] |  |
Variable Interest Entity [Line Items] |  |
GM Financial receivables, net of fees – current | 28,017 | 26,850
GM Financial receivables, net of fees – non-current | 25,743 | 25,083
GM Financial short-term debt and current portion of long-term debt | 31,884 | 30,956
GM Financial long-term debt | 57,244 | 60,032
Consolidated VIE [Member] | GM Financial [Member] |  |
Variable Interest Entity [Line Items] |  |
Restricted cash – current | 2,106 | 1,876
Restricted cash – non-current | 478 | 504
GM Financial receivables, net of fees – current | 19,401 | 18,304
GM Financial receivables, net of fees – non-current | 13,036 | 14,008
GM Financial equipment on operating leases, net |  | 21,781
GM Financial short-term debt and current portion of long-term debt | 21,116 | 21,087
GM Financial long-term debt | 17,786 | $ 21,417
Consolidated VIE [Member] | GM Financial [Member] | Equipment Leased to Other Party [Member] |  |
Variable Interest Entity [Line Items] |  |
GM Financial equipment on operating leases, net | $ 17,603 |

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