Allowance for Credit Losses - Narrative (Details) $ in Millions	6 Months Ended
Jun. 30, 2026 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	$ 31,500
Net addition (reduction) to the allowance for credit losses	303
Wholesale
Financing Receivable, Allowance for Credit Loss [Line Items]
Net addition (reduction) to the allowance for credit losses	473
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Net addition (reduction) to the allowance for credit losses	$ (128)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
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-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
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+ Details