Concentration of Credit Risk (Details) (USD $)	12 Months Ended
Feb. 02, 2013
Concentration risk
Percentage of increase or decrease in interest rates affecting income before income taxes	1.00%
Amount of effect of one percent increase or decrease in interest rates on income before income taxes	$ 16,000,000
Percentage of increase or decrease in interest rates affecting fair value of long-term fixed rate debt	1.00%
Amount of effect of one percent increase or decrease in interest rates on fair value of long-term fixed rate debt	21,000,000
Minimum
Concentration risk
Balance deposited with federally-insured financial institutions	250,000
Maximum
Concentration risk
Aggregate account balance is subjected to be insured by the Federal Deposit Insurance Corporation	$ 250,000

Aggregate account balance is subjected to be insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	mik_AggregateAccountBalanceInsuredByFDIC
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of effect of one percent increase or decrease in interest rate on fair value of long-term fixed rate debt.

No definition available.

Name:	mik_EffectOfOnePercentIncreaseOrDecreaseInFixedInterestRatesOnFairValueOfLongTermFixedRateDebt
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of effect of one percent increase or decrease in interest rate on income before income taxes.

No definition available.

Name:	mik_EffectOfOnePercentIncreaseOrDecreaseInVariableDebtInterestRatesOnIncomeBeforeIncomeTaxes
Namespace Prefix:	mik_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the percentage of increase or decrease in interest rates affecting fair value of long-term fixed rate debt.

No definition available.

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

Represents the percentage of increase or decrease in interest rates affecting income before income taxes.

No definition available.

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

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

No definition available.

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

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