v2.4.1.9

Organization and Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
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Jan. 31, 2015 | Feb. 01, 2014
Number of states in which entity operates | 45 us-gaap_NumberOfStatesInWhichEntityOperates |
Maximum number of merchandise vendors providing advertising allowances | 1,000 m_MaximumNumberOfMerchandiseVendorsProvidingAdvertisingAllowances |
Number of years analyzed for gift card redemption patterns | 3 m_NumberOfYearsInAnalyzedGiftCardRedemptionData |
Minimum [Member] |  |
Number of months sales are expected to occur after advertising and direct marketing programs | 1 m_PeriodWhichSalesAreExpectedToOccurDueToAdvertisingAndDirectMarketing / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum [Member] |  |
Number of months sales are expected to occur after advertising and direct marketing programs | 4 m_PeriodWhichSalesAreExpectedToOccurDueToAdvertisingAndDirectMarketing / us-gaap_RangeAxis = us-gaap_MaximumMember |
Vendor allowance terms (in years) | 1 m_VendorAllowanceTermsInYears / us-gaap_RangeAxis = us-gaap_MaximumMember |
Buildings and Building Equipment [Member] | Minimum [Member] |  |
Estimated useful life in years, minimum | 15 years |
Buildings and Building Equipment [Member] | Maximum [Member] |  |
Estimated useful life in years, minimum | 50 years |
Fixtures and Equipment [Member] | Minimum [Member] |  |
Estimated useful life in years, minimum | 3 years |
Fixtures and Equipment [Member] | Maximum [Member] |  |
Estimated useful life in years, minimum | 15 years |
Software and Software Development [Member] | Minimum [Member] |  |
Estimated useful life in years, minimum | 2 years |
Software and Software Development [Member] | Maximum [Member] |  |
Estimated useful life in years, minimum | 5 years |
Cash and Cash Equivalents [Member] |  |
Credit card sales transactions settled early | 111 us-gaap_CreditCardReceivables / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CashAndCashEquivalentsMember | $ 101 us-gaap_CreditCardReceivables / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CashAndCashEquivalentsMember

X
- Definition Maximum Number Of Merchandise Vendors Providing Advertising Allowances + References No definition available. + Details
Name: | m_MaximumNumberOfMerchandiseVendorsProvidingAdvertisingAllowances
Namespace Prefix: | m_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Years In Analyzed Gift Card Redemption Data + References No definition available. + Details
Name: | m_NumberOfYearsInAnalyzedGiftCardRedemptionData
Namespace Prefix: | m_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period Which Sales Are Expected To Occur Due To Advertising And Direct Marketing Costs + References No definition available. + Details
Name: | m_PeriodWhichSalesAreExpectedToOccurDueToAdvertisingAndDirectMarketing
Namespace Prefix: | m_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Vendor Allowance Terms In Years + References No definition available. + Details
Name: | m_VendorAllowanceTermsInYears
Namespace Prefix: | m_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amounts receivable from issuing a card to individuals or businesses that allows someone to make a purchase on borrowed money. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CreditCardReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |