Allowance for Credit Losses - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	$ 31,400
Net addition (reduction) to the allowance for credit losses	154
Wholesale
Financing Receivable, Allowance for Credit Loss [Line Items]
Net addition (reduction) to the allowance for credit losses	321
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Net addition (reduction) to the allowance for credit losses	$ (139)