Document and Entity Information - USD ($)
12 Months Ended
Jan. 31, 2017
Mar. 13, 2017
Jul. 31, 2016
Document Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 31, 2017    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Trading Symbol TIF    
Entity Registrant Name TIFFANY & CO    
Entity Central Index Key 0000098246    
Current Fiscal Year End Date --01-31    
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   124,564,854  
Entity Public Float     $ 8,002,474,636