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Variable Interest Entities (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
GM Financial |  |
Consolidated [Abstract] |  |
GM Financial receivables, net of fees – current | $ 24,444 | $ 26,209
GM Financial receivables, net of fees – non-current | 35,507 | 31,783
GM Financial short-term debt and current portion of long-term debt | 33,294 | 35,637
GM Financial long-term debt | 60,276 | 56,788
Consolidated VIE | GM Financial |  |
Consolidated [Abstract] |  |
Restricted cash – current | 3,191 | 2,190
Restricted cash – non-current | 476 | 449
GM Financial receivables, net of fees – current | 13,726 | 17,211
GM Financial receivables, net of fees – non-current | 14,141 | 15,107
GM Financial equipment on operating leases, net | 17,413 | 16,322
GM Financial short-term debt and current portion of long-term debt | 18,090 | 20,450
GM Financial long-term debt | 20,511 | 18,974
Variable Interest Entity, Not Primary Beneficiary |  |
Consolidated [Abstract] |  |
Maximum loss exposure amount | 2,200 | 1,200
Variable Interest Entity, Not Primary Beneficiary | Ultium Cells LLC | Capital Addition Purchase Commitments |  |
Consolidated [Abstract] |  |
Committed capital contributions | $ 1,500 | $ 776

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