| Component: (Network and Table) | |
|---|---|
| Network | 2412403 - Disclosure - Inventories - Summary of Inventory Components (Details) (http://www.signetjewelers.com/role/InventoriesSummaryOfInventoryComponentsDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000832988 (http://www.sec.gov/CIK) |
| Inventory Disclosure [Abstract] | Period [Axis] | |
|---|---|---|
2017-01-28 | 2016-01-30 | |
Inventory Disclosure [Abstract] | ||
Raw materials | ||
Finished goods | ||
Total inventories | 2,449,300,000 | 2,453,900,000 |