Annual report pursuant to Section 13 and 15(d)

Retirement Plans (Details)

v2.4.1.9
Retirement Plans (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 31, 2015
item
Feb. 01, 2014
Feb. 02, 2013
Retirement Plans      
Minimum age of the employees eligible to participate in the defined contribution plan 21mik_DefinedContributionPlanEligibilityCriteriaMinimumAgeOfEmployees    
Completion of hours of service of the employees eligible to participate in the defined contribution plan (in hour) 500mik_DefinedContributionPlanEligibilityCriteriaCompletedHoursOfServiceInCertainPeriod    
Eligibility period for completion of eligible service hours 6 months    
Maximum employees contribution as percentage of their compensation on a pre-tax basis 80.00%mik_DefinedContributionPlanMaximumEmployeesContributionPercentageOnPreTaxBasis    
Maximum employees contribution as percentage of their compensation on an after-tax basis 10.00%mik_DefinedContributionPlanMaximumEmployeesContributionPercentageOnAfterTaxBasis    
Percentage of employees' gross pay for which the employer contributes a matching contribution 6.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent    
Percentage employer matches 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch    
Vesting percentage of matching contributions 100.00%mik_DefinedContributionPlanEmployersMatchingContributionVestingPercentage    
Vesting period of matching contributions 3 years    
Matching contribution expense, net of forfeitures $ 4us-gaap_DefinedContributionPlanCostRecognized $ 4us-gaap_DefinedContributionPlanCostRecognized $ 4us-gaap_DefinedContributionPlanCostRecognized