Finance Receivables, Net (Contractual Maturities on Retail Receivables and Dealer Financing) (Details) $ in Millions	Mar. 31, 2017 USD ($)
Retail receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2018	$ 14,357
2019	12,723
2020	10,498
2021	7,571
2022	4,402
Thereafter	1,858
Total	51,409
Dealer financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2018	13,548
2019	1,739
2020	753
2021	576
2022	657
Thereafter	626
Total	$ 17,899

Notes receivables excluding estimated unguaranteed residual values in direct financing lease.

No definition available.

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- Definition

Receivables to customers expected to be collected in or after five years from the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Receivables to customers expected to be collected in less than five years but greater than four years from the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Receivables to customers expected to be collected in less than four years but greater than three years from the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Receivables to customers expected to be collected within one year from the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Receivables to customers expected to be collected in less than three years but greater than two years from the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Receivables to customers expected to be collected in less than two years but greater than one year from the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- 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

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- Details

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- Details

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