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Restructuring Plans - Restructuring and Related Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 39 Months Ended
--- | --- | ---
May 01, 2021 | May 02, 2020 | May 01, 2021
Restructuring Cost and Reserve [Line Items] |  |  |
Total Signet Path to Brilliance Plan expenses | $ (0.7) | $ 12.7 |
Signet Path to Brilliance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total Signet Path to Brilliance Plan expenses | (0.7) | 12.3 | $ 251.9
Signet Path to Brilliance | Cost of sales |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Inventory charges | 0.0 | (0.4) |
Signet Path to Brilliance | Restructuring Charges |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Other Plan related expenses | (0.7) | $ 12.7 |
Inventory charges | Signet Path to Brilliance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total Signet Path to Brilliance Plan expenses | 0.0 |  | 72.8
Termination benefits | Signet Path to Brilliance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total Signet Path to Brilliance Plan expenses | (0.7) |  | 49.2
Store closure and other costs | Signet Path to Brilliance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Total Signet Path to Brilliance Plan expenses | $ 0.0 |  | $ 129.9

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