Dollar Tree, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

Summary of Significant Accounting Policies (Details)		3 Months Ended										12 Months Ended
Summary of Significant Accounting Policies (Details)	Feb. 03, 2019 USD ($)	Feb. 01, 2020 USD ($) state store province $ / shares	Nov. 02, 2019 store $ / shares	Aug. 03, 2019 store $ / shares	May 04, 2019 store $ / shares	Feb. 02, 2019 USD ($) store $ / shares	Nov. 03, 2018 store $ / shares	Aug. 04, 2018 store $ / shares	May 05, 2018 store $ / shares	Feb. 03, 2018 USD ($)	Oct. 28, 2017 USD ($)	Feb. 01, 2020 USD ($) state store province distribution_center segment $ / shares	Feb. 02, 2019 USD ($) store $ / shares	Feb. 03, 2018 USD ($) $ / shares	Jan. 30, 2016 store
Property, Plant and Equipment [Line Items]
Number of retail discount stores \| store		15,288	15,262	15,115	15,264	15,237	15,187	15,073	14,957			15,288	15,237
Number of states/provinces the Company operates in \| state		48										48
Number of reporting business segments \| segment												2
Money market securities valued at cost, in cash and cash equivalents		$ 287,600,000				$ 170,000,000.0						$ 287,600,000	$ 170,000,000.0
Warehousing and distribution costs capitalized into inventory		$ 169,700,000				161,100,000						169,700,000	161,100,000
Interest Costs Capitalized												2,400,000	4,200,000	$ 2,300,000
Amortization expense, net												52,900,000
Amortization expense, net													65,400,000	69,200,000
Impairment charge for certain store assets						$ 13,000,000.0						9,100,000	13,000,000.0	5,600,000
Operating lease, impairment loss												8,500,000
Advertising costs												102,900,000	99,900,000	106,300,000
Stock-based compensation expense												$ 61,400,000	$ 63,300,000	$ 65,800,000
Diluted net income (loss) per share (usd per share) \| $ / shares		$ 0.52	$ 1.08	$ 0.76	$ 1.12	$ (9.69)	$ 1.18	$ 1.15	$ 0.67			$ 3.47	$ (6.69)	$ 7.21
Operating lease right-of-use assets		$ 6,225,000,000.0										$ 6,225,000,000.0
Operating lease liabilities		6,258,800,000										6,258,800,000
Cumulative effect of adopted accounting standards, net	$ (65,300,000)
Favorable lease rights		$ 0				$ 288,700,000						$ 0	$ 288,700,000
Buildings \| Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)												39 years
Buildings \| Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)												40 years
Furniture, fixtures and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)												3 years
Furniture, fixtures and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)												15 years
Software Development
Property, Plant and Equipment [Line Items]
Useful life (in years)												3 years
Dollar Tree
Property, Plant and Equipment [Line Items]
Merchandise fixed price												$ 1.00
Family Dollar
Property, Plant and Equipment [Line Items]
Number of distribution centers \| distribution_center												11
United States \| Dollar Tree
Property, Plant and Equipment [Line Items]
Number of distribution centers \| distribution_center												13
Canada
Property, Plant and Equipment [Line Items]
Number of states/provinces the Company operates in \| province		5										5
Canada \| Dollar Tree
Property, Plant and Equipment [Line Items]
Number of distribution centers \| distribution_center												2
Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Number of stores required for divestiture \| store															330
Dollar Express, LLC
Property, Plant and Equipment [Line Items]
Write off of accounts receivable										$ 18,500,000	$ 53,500,000
Dollar Express, LLC Litigation
Property, Plant and Equipment [Line Items]
Settlement received										$ 35,000,000.0
Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Operating lease, impairment loss	96,000,000.0
Operating lease right-of-use assets	6,200,000,000
Operating lease liabilities	6,100,000,000
Accrued rent	108,000,000.0
Lease incentive receivable	67,000,000.0
Retained Earnings
Property, Plant and Equipment [Line Items]
Cumulative effect of adopted accounting standards, net	(65,300,000)
Retained Earnings \| Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Cumulative effect of adopted accounting standards, net	(65,300,000)
Off-Market Favorable Lease \| Accounting Standards Update 2016-02
Property, Plant and Equipment [Line Items]
Favorable lease rights	$ 210,000,000.0
Previously Reported
Property, Plant and Equipment [Line Items]
Diluted net income (loss) per share (usd per share) \| $ / shares													$ (6.66)