Dollar Tree, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Stock-Based Compensation Plans - Stock-based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 01, 2025	Feb. 03, 2024	Jan. 28, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 124.9	$ 96.7	$ 110.4
Excess tax benefit (deficit) on stock-based compensation recognized in the provision for income taxes	(0.9)	3.9	9.8
Cost of sales
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	13.9	11.9	10.3
Selling, general and administrative expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	93.0	64.4	81.2
Income (loss) from discontinued operations, net of tax
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 18.0	$ 20.4	$ 18.9