Revenues (Details) - Loyalty Program $ in Millions	3 Months Ended
Apr. 30, 2022 USD ($) item	May 01, 2021 USD ($)
Revenues
Number of performance obligations \| item	2
Contract with customer, liability, increase due to points and material rights earned on purchases	$ 7.6	$ 9.3
Contract with customer, liability, decrease due to expirations and redemptions	$ 8.2	$ 7.1

Amount of increase in obligation to transfer goods or services to customers for which consideration from the customer has been received or is due, from points and material rights earned on purchases.

No definition available.

Name:	cal_ContractWithCustomerLiabilityIncreaseDueToPointsAndMaterialRightsAccruedForPurchases
Namespace Prefix:	cal_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration