This item represents investments in available-for-sale securities from related parties.

No definition available.

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

- 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

Maximum lending capacity under a note.

+ References

No definition available.

+ Details

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

- Definition

Fees incurred under credit support agreement with a related party.

+ References

No definition available.

+ Details

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

- 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

For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Article 7

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.3)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Related Parties

-URI http://asc.fasb.org/extlink&oid=16382449

+ Details

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

- Definition

The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

+ Details

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

- 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_ToyotaCreditCanadaIncMember
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_RelatedPartyTransactionsByRelatedPartyAxis=tmcc_ToyotaFinancialServicesCorporationMember
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:

- Details

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

- Details

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

Related Party Transactions - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Related Party Transaction [Line Items]
Credit Support Fees	$ 88	$ 82	$ 72
Finance receivables, net	1,184us-gaap_NotesReceivableRelatedParties	1,172us-gaap_NotesReceivableRelatedParties
Investments in operating leases, net	31,128	24,769
Investments in affiliates' commercial paper	37	0
TFSC [Member] \| Financing Support Arrangements [Member]
Related Party Transaction [Line Items]
Credit Support Fees	88	82	72
TFSB [Member] \| Other Financing Support Arrangements [Member]
Related Party Transaction [Line Items]
Maximum Lending Amount	150
TFSB [Member] \| Other Financing Support Arrangements [Member] \| Residential Mortgage [Member]
Related Party Transaction [Line Items]
Annual Maximum Participation	60
Loans Purchased	47	52
TMS [Member] \| Operational Support Arrangements [Member]
Related Party Transaction [Line Items]
Lease agreement expiration year	2018
TMIS [Member] \| Operational Support Arrangements [Member]
Related Party Transaction [Line Items]
Risk Ceded to Reinsurers	99.00%
TMCC-affiliated companies [Member]
Related Party Transaction [Line Items]
Investments in operating leases, net	7	7
TMCC-affiliated companies [Member] \| Other Arrangements with Affiliates [Member]
Related Party Transaction [Line Items]
Finance receivables, net	984
Investments in operating leases, net	923
TCCI [Member] \| Other Arrangements with Affiliates [Member]
Related Party Transaction [Line Items]
Investments in affiliates' commercial paper	$ 37