Allowance for Credit Losses - Past Due Finance Receivables and Investments in Operating Leases (Details) - USD ($) $ in Millions	Sep. 30, 2015	Mar. 31, 2015
Past Due Finance Receivables and Investments in Operating Leases
Finance receivables	$ 231	$ 153
Investments in operating leases	81	52
Total	$ 312	$ 205

Aggregate amount of financing and leases receivables that are equal to or greater than 60 days past due.

No definition available.

Name:	tmcc_FinancingAndLeasesReceivableEqualToGreaterThan60DaysPastDue
Namespace Prefix:	tmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant