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Document and Entity Information - USD ($)
 12 Months Ended
Jan. 28, 2017
Feb. 25, 2017
Jul. 30, 2016
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 28, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Trading Symbol TJX    
Entity Registrant Name TJX COMPANIES INC /DE/    
Entity Central Index Key 0000109198    
Current Fiscal Year End Date --01-28    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   645,589,872  
Entity Public Float     $ 53,583,828,925