ACCOUNTING POLICIES - SEGMENTS (Details)	12 Months Ended
Feb. 02, 2019
ACCOUNTING POLICIES
Company's retail operations (as a percent)	97.00%

This element represents the percentage of sales and EBITDA for its only reportable segment to total sales.

No definition available.

Name:	kr_CompanyRetailOperationPercentOfSales
Namespace Prefix:	kr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration