Segment Reporting - Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Finance receivables, net	$ 52,820	$ 53,473
Total assets	115,549	109,217
North America Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	47,633	46,679
Total assets	107,340	99,453
International Segment [Member]
Segment Reporting Information [Line Items]
Finance receivables, net	5,187	6,794
Total assets	8,209	9,764
Assets Leased to Others [Member]
Segment Reporting Information [Line Items]
Leased vehicles, net (Note 4; Note 8 VIEs)	41,296	42,055
Assets Leased to Others [Member] \| North America Segment [Member]
Segment Reporting Information [Line Items]
Leased vehicles, net (Note 4; Note 8 VIEs)	41,160	41,881
Assets Leased to Others [Member] \| International Segment [Member]
Segment Reporting Information [Line Items]
Leased vehicles, net (Note 4; Note 8 VIEs)	$ 136	$ 174

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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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.

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