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Restructuring Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			27 Months Ended	36 Months Ended
	May 02, 2020	May 04, 2019	May 05, 2018	May 02, 2020	Feb. 03, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 12.7	$ 26.8
Signet Path to Brillance
Restructuring Cost and Reserve [Line Items]
Restructuring plan, length			3 years
Restructuring charges	12.3	$ 26.8		$ 217.3
Cash payments	$ 12.0
Scenario, Forecast | Minimum | Signet Path to Brillance
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 200.0
Cash payments					105.0
Scenario, Forecast | Maximum | Signet Path to Brillance
Restructuring Cost and Reserve [Line Items]
Restructuring charges					220.0
Cash payments					$ 115.0

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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