Name:	mik_DefinedContributionPlanEligibilityCriteriaAgeOfEmployees
Namespace Prefix:	mik_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the hours of service completed by an employee in a specified period, a criteria for the eligibility of the employee to participate in the savings plan of the entity.

No definition available.

Name:	mik_DefinedContributionPlanEligibilityCriteriaCompletedHoursOfServiceInCertainPeriod
Namespace Prefix:	mik_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the eligibility period for completion of specified service hours of an employee so as to participate in the savings plan of the entity.

No definition available.

Name:	mik_DefinedContributionPlanEligibilityPeriod
Namespace Prefix:	mik_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of employer's matching contributions to a defined contribution plan that vests in a specified period.

No definition available.

Name:	mik_DefinedContributionPlanEmployersMatchingContributionVestingPercentage
Namespace Prefix:	mik_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the period over which employer's matching contributions to a defined contribution plan vests.

No definition available.

Name:	mik_DefinedContributionPlanEmployersMatchingContributionVestingPeriod
Namespace Prefix:	mik_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the maximum employees contribution to the defined contribution plan of the entity expressed as a percentage of their compensation on an after-tax basis.

No definition available.

Name:	mik_DefinedContributionPlanMaximumEmployeesContributionPercentageOnAfterTaxBasis
Namespace Prefix:	mik_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the maximum employees contribution to the defined contribution plan of the entity expressed as a percentage of their compensation on a pre-tax basis.

No definition available.

Name:	mik_DefinedContributionPlanMaximumEmployeesContributionPercentageOnPreTaxBasis
Namespace Prefix:	mik_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.