Allowance for Credit Losses - Additional Information (Details) - Finance Receivables, Net [Member] - Financial Guarantee [Member] - Dealer Products [Member] - USD ($) $ in Millions	Mar. 31, 2023	Mar. 31, 2022
TMNA [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Ending Balance: collectively evaluated for impairment	$ 1,000	$ 929
Private Toyota Distributors [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Ending Balance: collectively evaluated for impairment	$ 199	$ 187

The balance of financing receivables that were collectively evaluated for impairment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Name:	us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant