| Document and Entity Information | Dec. 31, 2019 |
| Cover [Abstract] | |
| Entity Registrant Name | TIFFANY & CO |
| Amendment Flag | false |
| Entity Central Index Key | 0000098246 |
| Document Type | 8-K |
| Document Period End Date | Dec. 31, 2019 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-9494 |
| Entity Tax Identification Number | 13-3228013 |
| Entity Address, Address Line One | 200 Fifth Avenue |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10010 |
| City Area Code | (212) |
| Local Phone Number | 755-8000 |
| Written Communications | false |
| Soliciting Material | true |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 per share |
| Trading Symbol | TIF |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
