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Derivative Financial Instruments - Notional Amounts for Derivative Financial Instruments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2023 | Dec. 31, 2022
Automotive | Not Designated as Hedges |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | $ 2,732 | $ 5,148
Automotive | Not Designated as Hedges | Foreign currency | Fair Value Level 2 |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 2,035 | 4,072
Automotive | Not Designated as Hedges | Commodity | Fair Value Level 2 |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 697 | 1,075
GM Financial |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 145,643 | 142,212
Fair Value of Assets |  |  | 2,333 | 2,302
Fair Value of Liabilities |  |  | 3,329 | 3,392
Collateral |  |  | 678 | 553
Collateral available for netting |  |  | 1,400 | 1,500
GM Financial | Cash Flow Hedges | Foreign currency |  |  |  |
Derivative [Line Items] |  |  |  |
Loss recognized in AOCI | $ 392 | $ 449 |  |
Loss on AOCI reclassification | $ 408 | $ 557 |  |
GM Financial | Not Designated as Hedges | Interest rate contracts | Fair Value Level 2 |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 111,523 | 113,975
Fair Value of Assets |  |  | 2,263 | 2,268
Fair Value of Liabilities |  |  | 2,379 | 1,984
GM Financial | Designated as Hedges | Fair Value Hedges | Interest rate swaps | Fair Value Level 2 |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 23,528 | 19,950
Fair Value of Assets |  |  | 0 | 0
Fair Value of Liabilities |  |  | 489 | 821
GM Financial | Designated as Hedges | Cash Flow Hedges | Interest rate swaps | Fair Value Level 2 |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 1,853 | 1,434
Fair Value of Assets |  |  | 19 | 34
Fair Value of Liabilities |  |  | 10 | 1
GM Financial | Designated as Hedges | Cash Flow Hedges | Foreign currency swaps | Fair Value Level 2 |  |  |  |
Derivative [Line Items] |  |  |  |
Notional |  |  | 8,739 | 6,852
Fair Value of Assets |  |  | 51 | 0
Fair Value of Liabilities |  |  | $ 451 | $ 586

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