| Cover | Jun. 03, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 3, 2020 |
| Entity File Number | 0-19848 |
| Entity Registrant Name | FOSSIL GROUP, INC. |
| Entity Central Index Key | 0000883569 |
| Entity Tax Identification Number | 75-2018505 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 901 S. Central Expressway |
| Entity Address, City or Town | Richardson |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75080 |
| City Area Code | 972 |
| Local Phone Number | 234-2525 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | FOSL |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
