Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
||
|---|---|---|---|---|---|
| Other Assets [Abstract] | |||||
| Accrued interest and fees on finance receivables | $ 186 | $ 163 | |||
| Accrued rental payments and fees on operating leases | 72 | 64 | |||
| Vehicles held for disposition | 133 | 138 | |||
| Restricted cash | [1] | 715 | 715 | $ 420 | |
| Operating lease right-of-use assets | 46 | 54 | |||
| Other miscellaneous assets | 118 | 80 | |||
| Total | $ 1,270 | $ 1,214 | |||
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Total | Total | |||
| |||||
| X | ||||||||||
- Definition Financing Receivable, Accrued Interest And Fees, After Allowance For Credit Loss No definition available.
|
| X | ||||||||||
- Definition Operating Lease, Accrued Rental Payments And Fees No definition available.
|
| X | ||||||||||
- Definition Vehicles held for disposition consist of returned and repossessed vehicles. The vehicles are either sold at used vehicle auctions or purchased by dealers, usually within two months of return or repossession. The vehicles are valued at the lower of their carrying value or estimated fair value, less estimated disposition costs. No definition available.
|
| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Indicates line item in statement of financial position that includes operating lease right-of-use asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of assets classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of other miscellaneous assets. No definition available.
|
| X | ||||||||||
- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|