XML 103 R80.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Retirement Plans (Weighted Average Assumptions Used To Determine Net Periodic Pension Costs For The Supplemental Retirement Plan) (Details) | 12 Months Ended
--- | ---
Jan. 30, 2016
Supplemental Employee Retirement Plan |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Interest Cost | 3.55%

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Interest Cost + References No definition available. + Details
Name: | m_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateInterestCost
Namespace Prefix: | m_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |