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Derivative Financial Instruments - Derivative Financial Instruments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |  |
DerivativeAssetStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag | Fair Value of Assets | Fair Value of Assets |
DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag | Fair Value of Liabilities | Fair Value of Liabilities |
GM Financial |  |  |
Derivative [Line Items] |  |  |
Derivative notional amount | $ 163,446 | $ 142,212 |
Fair Value of Assets | 1,809 | 2,302 |
Fair Value of Liabilities | 2,563 | 3,392 |
Collateral | 457 | 553 |
Collateral available for netting | 1,200 | 1,500 |
GM Financial | Cash Flow Hedges | Foreign currency |  |  |
Derivative [Line Items] |  |  |
Loss recognized in AOCI | (139) | (529) | $ (352)
(Gains) losses reclassified from AOCI | (92) | 578 | $ 409
GM Financial | Designated as Hedges | Fair Value Hedges | Interest rate swaps | Fair Value Level 2 |  |  |
Derivative [Line Items] |  |  |
Derivative notional amount | 18,379 | 19,950 |
Fair Value of Assets | 75 | 0 |
Fair Value of Liabilities | 238 | 821 |
GM Financial | Designated as Hedges | Cash Flow Hedges | Interest rate swaps | Fair Value Level 2 |  |  |
Derivative [Line Items] |  |  |
Derivative notional amount | 2,381 | 1,434 |
Fair Value of Assets | 17 | 34 |
Fair Value of Liabilities | 16 | 1 |
GM Financial | Designated as Hedges | Cash Flow Hedges | Foreign currency swaps | Fair Value Level 2 |  |  |
Derivative [Line Items] |  |  |
Derivative notional amount | 8,003 | 6,852 |
Fair Value of Assets | 144 | 0 |
Fair Value of Liabilities | 311 | 586 |
GM Financial | Not Designated as Hedges | Interest rate contracts | Fair Value Level 2 |  |  |
Derivative [Line Items] |  |  |
Derivative notional amount | 134,683 | 113,975 |
Fair Value of Assets | 1,573 | 2,268 |
Fair Value of Liabilities | $ 1,997 | $ 1,984 |

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