Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Narrative) (Details)

v2.4.1.9
Stock Based Compensation (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Y
Feb. 01, 2014
Feb. 02, 2013
Number of Company equity plans prior to 2009 2m_NumberOfEquityPlansPriorToTwoThousandNine    
Number of years stock and stock option grant plans are active 10m_TermOfStockOptionGrantPlansNumberOfYears    
Shares available for additional grants under the Company's equity plan 24us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant    
Tax benefit recognized in Statement of Operations related to stock-based compensation $ 26us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense $ 22us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense $ 22us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Evaluation period of performance-based restricted stock plan for senior executives 3m_EvaluationPeriodOfPerformanceBasedRestrictedStockPlanInYears    
Cash payment of stock credit plan balance   32m_CashPaymentOfStockCreditPlanBalance 28m_CashPaymentOfStockCreditPlanBalance
Restricted Stock and Time-Based Restricted Stock Unit Awards [Member] | Minimum [Member]      
Number of years of service required to vest in stock based compensation plans 1m_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodNumberOfYears
/ us-gaap_AwardTypeAxis
= m_RestrictedStockAndTimeBasedRestrictedStockUnitAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Restricted Stock and Time-Based Restricted Stock Unit Awards [Member] | Maximum [Member]      
Number of years of service required to vest in stock based compensation plans 4m_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodNumberOfYears
/ us-gaap_AwardTypeAxis
= m_RestrictedStockAndTimeBasedRestrictedStockUnitAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Restricted Stock Units [Member]      
Unrecognized compensation costs related to nonvested restricted stock awards 29us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
   
Unrecognized compensation costs related to nonvested restricted stock awards 1 year 4 months 24 days    
Employee Stock Options [Member]      
Number of years of service required to vest in stock based compensation plans 4m_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodNumberOfYears
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Unrecognized compensation costs related to nonvested restricted stock awards $ 62us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Unrecognized compensation costs related to nonvested restricted stock awards 1 year 9 months 18 days    
2008 Stock Credit Grant Plan [Member]      
Evaluation of period of stock credit plan in years     2m_EvaluationOfPeriodOfStockCreditPlanInYears
/ us-gaap_AwardTypeAxis
= m_TwoThousandEightStockCreditGrantPlanMember
Number of stock credit awards outstanding     836,268m_NumberOfStockCreditAwardsOutstanding
/ us-gaap_AwardTypeAxis
= m_TwoThousandEightStockCreditGrantPlanMember
2009 Omnibus Incentive Compensation Plan [Member]      
Common Stock Shares Authorized to be issued under stock compensation plan 51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= m_TwoThousandNineOmnibusIncentiveCompensationPlanMember
   
CMD Committee Performance-Based Restricted Stock Plan [Member]      
Evaluation period of performance-based restricted stock plan for senior executives 3m_EvaluationPeriodOfPerformanceBasedRestrictedStockPlanInYears
/ us-gaap_AwardTypeAxis
= m_CmdCommitteePerformanceBasedRestrictedStockPlanMember
   
CMD Committee Performance-Based Restricted Stock Plan [Member] | Minimum [Member]      
Percentage range of shares received by grant recipient based on target shares granted 0.00%m_PercentageRangeOfSharesReceivedByGrantRecipientBasedOnTargetAmountOfShares
/ us-gaap_AwardTypeAxis
= m_CmdCommitteePerformanceBasedRestrictedStockPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Number of companies in executive peer group for compensation plans 10m_NumberOfCompaniesInCompensationPeerGroupForShareBasedCompensationPlans
/ us-gaap_AwardTypeAxis
= m_CmdCommitteePerformanceBasedRestrictedStockPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
CMD Committee Performance-Based Restricted Stock Plan [Member] | Maximum [Member]      
Percentage range of shares received by grant recipient based on target shares granted 150.00%m_PercentageRangeOfSharesReceivedByGrantRecipientBasedOnTargetAmountOfShares
/ us-gaap_AwardTypeAxis
= m_CmdCommitteePerformanceBasedRestrictedStockPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Number of companies in executive peer group for compensation plans 12m_NumberOfCompaniesInCompensationPeerGroupForShareBasedCompensationPlans
/ us-gaap_AwardTypeAxis
= m_CmdCommitteePerformanceBasedRestrictedStockPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember