REVENUE RECOGNITION, Right of Return (Details)	3 Months Ended
May 05, 2018
REVENUE RECOGNITION
Maximum number of days merchandise allowed to be returned	180 days

Maximum period of time that merchandise is allowed to be returned after purchase, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

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