Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information
3 Months Ended
May 04, 2013
May 17, 2013
Document and Entity Information [Text Block] [Abstract]    
Entity Registrant Name Dollar Tree Inc  
Entity Central Index Key 0000935703  
Current Fiscal Year End Date --02-01  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status No  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   223,833,735
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date May 04, 2013