Credit card reward program cost.

No definition available.

Name:	tmcc_CreditCardRewardProgramCost
Namespace Prefix:	tmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Lease agreement expiration year.

+ References

No definition available.

+ Details

Name:	tmcc_LeaseAgreementExpirationYear
Namespace Prefix:	tmcc_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loans acquired from related party during the period.

+ References

No definition available.

+ Details

Name:	tmcc_LoansAcquiredFromRelatedPartiesDuringPeriod
Namespace Prefix:	tmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum amount of loans allowed to purchase from related party per year.

+ References

No definition available.

+ Details

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

- Definition

For an unclassified balance sheet, amounts of subvention support due from parties associated with the reporting entity.

+ References

No definition available.

+ Details

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

- Definition

Ratio of insurance contracts that are subject to reinsurance participation to all contracts in force.

+ References

No definition available.

+ Details

Name:	us-gaap_ContractsInForceSubjectToParticipationThroughReinsurancePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=tmcc_ToyotaMotorSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=tmcc_OperationalSupportArrangementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=tmcc_CustomerServiceCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=tmcc_ToyotaFinancialSavingsBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=tmcc_OtherFinancingSupportArrangementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=tmcc_ToyotaMotorInsuranceServicesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2015	Mar. 31, 2017	Mar. 31, 2016
TMS [Member]
Related Party Transaction [Line Items]
Subvention support receivable		$ 165,000,000	$ 127,000,000
TMS [Member] \| Operational Support Arrangements [Member]
Related Party Transaction [Line Items]
Lease agreement expiration year		2018
TMS [Member] \| Operational Support Arrangements [Member] \| Customer Service Center [Member]
Related Party Transaction [Line Items]
Lease agreement expiration year		2019
TFSB [Member]
Related Party Transaction [Line Items]
Credit card reward program cost	$ 0
TFSB [Member] \| Residential Mortgage [Member] \| Other Financing Support Arrangements [Member]
Related Party Transaction [Line Items]
Annual maximum participation		$ 60,000,000
Loans purchased		$ 33,000,000	$ 37,000,000
TMIS [Member] \| Operational Support Arrangements [Member]
Related Party Transaction [Line Items]
Risk ceded to reinsurers		99.00%