Segment reporting (Details) $ in Thousands	3 Months Ended
May 01, 2020 USD ($) segment	May 03, 2019 USD ($) segment
Net sales data for classes of similar products
Net sales	$ 8,448,449	$ 6,623,185
Number of reportable segments
Number of reportable operating segments \| segment	1	1
Consumables
Net sales data for classes of similar products
Net sales	$ 6,703,449	$ 5,213,155
Seasonal
Net sales data for classes of similar products
Net sales	917,912	736,978
Home products
Net sales data for classes of similar products
Net sales	498,282	375,713
Apparel
Net sales data for classes of similar products
Net sales	$ 328,806	$ 297,339

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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