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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