Annual report pursuant to Section 13 and 15(d)

Cover Page

v3.22.0.1
Cover Page - USD ($)
 12 Months Ended
Jan. 29, 2022
Mar. 07, 2022
Jul. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jan. 29, 2022    
Document Transition Report false    
Entity File Number 0-25464    
Entity Registrant Name DOLLAR TREE, INC.    
Entity Incorporation, State or Country Code VA    
Entity Tax Identification Number 26-2018846    
Entity Address, Address Line One 500 Volvo Parkway    
Entity Address, City or Town Chesapeake,    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 23320    
City Area Code 757    
Local Phone Number 321-5000    
Title of 12(b) Security Common Stock, par value $.01 per share    
Trading Symbol DLTR    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 22,404,353,447
Entity Common Stock, Shares Outstanding   225,110,329  
Documents Incorporated by Reference The information called for in Items 10, 11, 12, 13 and 14 of Part III, to the extent not set forth herein, is incorporated by reference to the definitive Proxy Statement for the 2022 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended January 29, 2022.    
Entity Central Index Key 0000935703    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Current Fiscal Year End Date --01-29