Name:	mtor_PensionandRetireeMedicalLiabilities
Namespace Prefix:	mtor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This item represents disclosure of the amount of dividends or other distributions received from consolidated subsidiaries and equity method investments.

No definition available.

Name:	mtor_ProceedsfromConsolidatedSubsidiariesandEquityMethodInvestments
Namespace Prefix:	mtor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restricted Assets Of Subsidiary Exceeding Consolidated Net Assets, As A Percentage

No definition available.

Name:	mtor_RestrictedAssetsOfSubsidiaryExceedingConsolidatedNetAssetsAsAPercentage
Namespace Prefix:	mtor_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

[Line Items] for Supplemental Disclosures [Table]

No definition available.

Name:	mtor_SupplementalDisclosuresLineItems
Namespace Prefix:	mtor_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Threshold For Reporting Consolidating Financial Statements

No definition available.

Name:	mtor_ThresholdForReportingConsolidatingFinancialStatements
Namespace Prefix:	mtor_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

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.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571