Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jul. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Period, Policy [Policy Text Block]	Fiscal Periods Our fiscal year ends on the Saturday nearest to January 31, which results in fiscal years consisting of 52 or 53 weeks. Unless otherwise stated, references to years in this report relate to fiscal years rather than calendar years. Fiscal year 2021 (“2021”) is comprised of the 52 weeks that began on January 31, 2021 and will end on January 29, 2022. Fiscal year 2020 (“2020”) was comprised of the 52 weeks that began on February 2, 2020 and ended on January 30, 2021. The fiscal quarters ended July 31, 2021 (“second quarter of 2021”) and August 1, 2020 (“second quarter of 2020”) were both comprised of 13 weeks. The year-to-date periods ended July 31, 2021 (“year-to-date 2021”) and August 1, 2020 (“year-to-date 2020”) were both comprised of 26 weeks.
Selling, General and Administrative Expenses, Policy [Policy Text Block]	Selling and Administrative Expenses Selling and administrative expenses include store expenses (such as payroll and occupancy costs) and costs related to warehousing (which includes rent), distribution, outbound transportation to our stores, advertising, purchasing, insurance, non-income taxes, accepting credit/debit cards, and overhead. Our selling and administrative expense rates may not be comparable to those of other retailers that include warehousing, distribution, and outbound transportation costs in cost of sales. Warehousing, distribution, and outbound transportation costs included in selling and administrative expenses were $71.9 million and $59.7 million for the second quarter of 2021 and the second quarter of 2020, respectively, and $138.1 million and $112.0 million for the year-to-date 2021 and the year-to-date 2020, respectively.
Advertising Cost [Policy Text Block]	Advertising Expense Advertising costs, which are expensed as incurred, consist primarily of television and print advertising, digital, social media, internet and e-mail marketing, payment card-linked marketing, and in-store point-of-purchase signage and presentations. Advertising expenses are included in selling and administrative expenses. Advertising expenses were $21.9 million and $21.9 million for the second quarter of 2021 and the second quarter of 2020, respectively, and $43.8 million and $44.8 million for the year-to-date 2021 and the year-to-date 2020, respectively.
Comparability of Prior Year Financial Data, Policy [Policy Text Block]	Reclassifications In the year-to-date 2021, we realigned select merchandise categories to be consistent with the realignment of our merchandising team and changes to our management reporting. To better suit the new alignment, we renamed our Electronics, Toys, & Accessories category as Apparel, Electronics, & Other. We moved our pet department from our Consumables category to our Food category; our home organization department from our Soft Home category to our Hard Home category; our toys department from our Apparel, Electronics, & Other category to our Hard Home category; our candy & snacks from our Food category to our Apparel, Electronics, & Other category; and added new departments for the merchandise assortments for The Lot, our cross-category presentation solution, and the Queue Line, our streamlined checkout experience, to the Apparel, Electronics, & Other category. Our seven merchandise categories, which match our internal management and reporting of merchandise net sales are now as follows: Food; Consumables; Soft Home; Hard Home; Furniture; Seasonal; and Apparel, Electronics, & Other. The Food category includes our beverage & grocery; specialty foods; and pet departments. The Consumables category includes our health, beauty and cosmetics; plastics; paper; and chemical departments. The Soft Home category includes our home décor; frames; fashion bedding; utility bedding; bath; window; decorative textile; and area rugs departments. The Hard Home category includes our small appliances; table top; food preparation; stationery; home maintenance; home organization; and toys departments. The Furniture category includes our upholstery; mattress; ready-to-assemble; and case goods departments. The Seasonal category includes our lawn & garden; summer; Christmas; and other holiday departments. The Apparel, Electronics, & Other department includes our apparel; electronics; jewelry; hosiery; and candy & snacks departments, as well as the assortment for The Lot, our cross-category presentation solution, and the assortment for the Queue Line, our streamlined checkout experience. In order to provide comparative information, we have reclassified our results into the new alignment for both periods presented.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting PronouncementsThere are currently no new accounting pronouncements with a future effective date that are of significance, or potential significance, to us.