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Derivative Financial Instruments - Balance Sheet Location of GM Financial Unsecured Debt (Details) - Fair Value Hedges - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
GM Financial
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	$ 36,664	$ 33,551
Cumulative Amount of Fair Value Hedging Adjustments	1,281	1,029
Cumulative fair value adjustment on discontinued hedging relationships	719	872
Automotive
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	4,405	670
Cumulative Amount of Fair Value Hedging Adjustments	48	(34)
Short-term Unsecured Debt | GM Financial
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	6,406	3,508
Cumulative Amount of Fair Value Hedging Adjustments	(6)	(8)
Short-term Unsecured Debt | Automotive
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	0	0
Cumulative Amount of Fair Value Hedging Adjustments	0	0
Long-term Unsecured Debt | GM Financial
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	30,258	30,043
Cumulative Amount of Fair Value Hedging Adjustments	1,287	1,037
Long-term Unsecured Debt | Automotive
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Items	4,405	670
Cumulative Amount of Fair Value Hedging Adjustments	$ 48	$ (34)

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- Definition

Amount of liability hedged in fair value hedging relationship.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4EE
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE

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