Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2018	Apr. 30, 2018	Sep. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Entity Registrant Name	Toyota Motor Credit Corporation
Entity Central Index Key	0000834071
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--03-31
Trading Symbol	TMCC
Entity Filer Category	Non-accelerated Filer
Entity Well Known Seasoned Issuer	Yes
Entity Common Stock Shares Outstanding		91,500
Entity Public Float			$ 0
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY