Segment reporting (Details) $ in Thousands	3 Months Ended
May 03, 2019 USD ($) segment	May 04, 2018 USD ($) segment
Net sales data for classes of similar products
Net sales	$ 6,623,185	$ 6,114,463
Number of reportable segments
Number of reportable operating segments \| segment	1	1
Consumables
Net sales data for classes of similar products
Net sales	$ 5,213,155	$ 4,772,388
Seasonal
Net sales data for classes of similar products
Net sales	736,978	691,031
Home products
Net sales data for classes of similar products
Net sales	375,713	354,633
Apparel
Net sales data for classes of similar products
Net sales	$ 297,339	$ 296,411

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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