Segment Reporting (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
May 02, 2015	May 03, 2014
Supplemental products and services sales information
Total net sales	$ 885,089us-gaap_SalesRevenueNet	$ 630,474us-gaap_SalesRevenueNet
Retail Segment
Supplemental products and services sales information
Total retail clothing product	666,862	433,024
Tuxedo rental services	103,129	101,663
Total alteration and other services	54,280	38,962
Total net sales	824,271	573,649
Retail Segment \| Men's tailored clothing product
Supplemental products and services sales information
Total retail clothing product	386,336	239,436
Retail Segment \| Men's non-tailored clothing product
Supplemental products and services sales information
Total retail clothing product	256,010	171,106
Retail Segment \| Ladies clothing product
Supplemental products and services sales information
Total retail clothing product	21,632	20,851
Retail Segment \| Other
Supplemental products and services sales information
Total retail clothing product	2,884	1,631
Retail Segment \| Alteration services
Supplemental products and services sales information
Total alteration and other services	45,963	31,215
Retail Segment \| Retail dry cleaning services
Supplemental products and services sales information
Total alteration and other services	8,317	7,747
Corporate Apparel Segment
Supplemental products and services sales information
Total net sales	$ 60,818	$ 56,825

Revenue generated during the reporting period from the rental of tuxedo product, net of (reduced by) return allowances and discounts.

No definition available.

+ Details

Name:	mw_TuxedoRentalServicesRevenue
Namespace Prefix:	mw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueGoodsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate revenue during the period for services rendered in the normal course of business (before deducting allowances and discounts) which are not otherwise defined in the taxonomy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueServicesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=mw_CorporateApparelSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=mw_RetailSegmentMember
Namespace Prefix:
Data Type:	na
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Period Type: