Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details 2)

v2.4.1.9
Fair Value Measurements (Details 2) (USD $)
In Millions, unless otherwise specified
Jan. 31, 2015
Carrying Value | Restated Term Loan Credit Facility  
Fair Value Measurements  
Long-term loans and notes $ 2,453us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
Carrying Value | 5.875% Senior Subordinated Notes due 2020  
Fair Value Measurements  
Long-term loans and notes 515us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= mik_SeniorSubordinatedNotes5.875PercentDue2020Member
Carrying Value | PIK Notes  
Fair Value Measurements  
Long-term loans and notes 181us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_PaymentInKindPIKNoteMember
Fair Value | Restated Term Loan Credit Facility  
Fair Value Measurements  
Long-term loans and notes 2,413us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
Fair Value | 5.875% Senior Subordinated Notes due 2020  
Fair Value Measurements  
Long-term loans and notes 516us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= mik_SeniorSubordinatedNotes5.875PercentDue2020Member
Fair Value | PIK Notes  
Fair Value Measurements  
Long-term loans and notes $ 184us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_PaymentInKindPIKNoteMember