Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v3.19.1
Document And Entity Information - shares
3 Months Ended
May 04, 2019
May 28, 2019
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 Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   237,578,972
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Entity Emerging Growth Company false  
Entity Small Business false  
Document Period End Date May 04, 2019