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

The secondary reference rate used to calculated the basis for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

Name:	mik_DebtInstrumentDescriptionOfVariableRateBasisSecondaryReferenceRate
Namespace Prefix:	mik_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the amount of average daily excess availability as a percentage of total commitments for higher commitment fee on the unutilized commitments.

No definition available.

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

Represents the amount of average daily excess availability as a percentage of total commitments for lower commitment fee on the unutilized commitments.

No definition available.

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

Represents the consolidated fixed charge coverage ratio required to be maintained under the terms of the credit facility.

No definition available.

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

Represents the amount of excess availability as a percentage of loan cap for maintaining specified consolidated fixed charge coverage ratio under the terms of the credit facility.

No definition available.

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

Represents the amount of excess availability as a percentage of loan cap for specified period for maintaining specified consolidated fixed charge coverage ratio under the terms of the credit facility..

No definition available.

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

Represents the excess availability as a percentage of loan cap for repayment of outstanding debt under the terms of the credit facility.

No definition available.

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

Represents the amount of excess availability for maintaining specified consolidated fixed charge coverage ratio under the terms of the credit facility.

No definition available.

Name:	mik_LineOfCreditFacilityExcessAvailabilityForMaintainingSpecifiedConsolidatedFixedChargeCoverageRatio
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of excess availability for repayment of outstanding debt under the terms of the credit facility.

No definition available.

Name:	mik_LineOfCreditFacilityExcessAvailabilityForRepaymentOfDebt
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of excess availability for specified period for maintaining specified consolidated fixed charge coverage ratio under the terms of the credit facility.

No definition available.

Name:	mik_LineOfCreditFacilityExcessAvailabilityForSpecifiedPeriodForMaintainingSpecifiedConsolidatedFixedChargeCoverageRatio
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Maximum borrowing capacity under the credit facility once the additional commitments are provided.

No definition available.

Name:	mik_LineOfCreditFacilityMaximumBorrowingCapacityOnceExpanded
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The additional commitments for maximum borrowing capacity available, which is subject to lender's approval.

No definition available.

Name:	mik_LineOfCreditFacilityOptionalExpansionMaximumBorrowingCapacity
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Percentage of appraised net orderly liquidation value of eligible inventory considered for calculation of borrowing base.

No definition available.

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

Percentage of appraised net orderly liquidation value of eligible inventory and eligible letters of credit considered for calculation of borrowing base.

No definition available.

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

Represents the percentage of eligible credit card receivables and debit card receivables used to determine the borrowing base.

No definition available.

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

Percentage of face value of eligible letters of credit supported by eligible letters of credit considered for calculation of borrowing base.

No definition available.

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

Represents period of the excess availability as a percentage of loan cap for maintaining specified consolidated fixed charge coverage ratio under the terms of the credit facility.

No definition available.

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

Represents period of the excess availability as a percentage of loan cap for repayment of outstanding debt under the terms of the credit facility.

No definition available.

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

The initial fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

No definition available.

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

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility, if the average daily excess availability is greater than the specified percentage.

No definition available.

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

No definition available.

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

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

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

For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization.

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16

-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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

Name:	us-gaap_DeferredFinanceCostsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 50

-Section 40

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 50

-Section 40

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 26

-Paragraph 20, 21

-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_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.