Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended
Jun. 30, 2015	Mar. 31, 2015
Commitments And Contingencies [Line Items]
Minimum lease commitments	$ 61,000,000	$ 60,000,000
Estimated moving costs	80,000,000
Indemnification provisions	0	0
Putnam and Gibson Counties [Member] \| Performance Guarantee [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	$ 100,000,000	100,000,000
TMS [Member]
Commitments And Contingencies [Line Items]
15-year lease agreement between TMCC and TMS	15 years
Expiration date of the 15-year lease agreement between TMCC and TMS	Mar. 31, 2018
Minimum lease commitments	$ 22,000,000	$ 23,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Performance Guarantee [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	100,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Performance Guarantee [Member] \| 2028 [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	20,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Performance Guarantee [Member] \| 2029 [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	50,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Performance Guarantee [Member] \| 2030 [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	10,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Performance Guarantee [Member] \| 2031 [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	10,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Performance Guarantee [Member] \| 2032 [Member]
Commitments And Contingencies [Line Items]
Guarantees of affiliate pollution control and solid waste disposal bonds	10,000,000
TMCC-affiliated companies [Member] \| Putnam and Gibson Counties [Member] \| Affiliate Pollution Control and Solid Waste Disposal Bonds [Member]
Commitments And Contingencies [Line Items]
Guaranty Fee	$ 78,000

Commitments and contingencies.

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- Definition

Moving and related cost estimated cost.

+ References

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- Definition

An operating lease agreement between the registrant and an affiliated party.

+ References

No definition available.

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- Definition

Provision for indemnification.

+ References

No definition available.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

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- Definition

This item represents the portion of monthly guaranty fees collected representing the interest imputed and recognized under the prospective interest method on the present value of the contractually stipulated guarantee payments at inception of the contract.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13 (d))

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- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

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- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

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