Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v2.4.1.9
Document And Entity Information
3 Months Ended
May 02, 2015
May 15, 2015
Document and Entity Information [Text Block] [Abstract]    
Entity Registrant Name Dollar Tree Inc  
Entity Central Index Key 0000935703  
Current Fiscal Year End Date --01-30  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   206,191,484dei_EntityCommonStockSharesOutstanding
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date May 02, 2015