Derivative Financial Instruments - Balance Sheet Location of GM Financial Unsecured Debt (Details) - GM Financial - Fair value hedges - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	$ 33,540	$ 35,187
Cumulative Amount of Fair Value Hedging Adjustments	677	693
Cumulative fair value adjustment on discontinued hedging relationships	363	428
Short-term unsecured debt
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	4,219	4,633
Cumulative Amount of Fair Value Hedging Adjustments	31	17
Long-term unsecured debt
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	29,321	30,554
Cumulative Amount of Fair Value Hedging Adjustments	$ 645	$ 676

Derivative Liabilities, Fair Value Adjustment On Discontinued Hedging Relationships

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- Definition

Derivative Liabilities, Increase (Decrease) In Fair Value Adjustment

+ References

No definition available.

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- Definition

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Amount of liability hedged in fair value hedging relationship.

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