Restructuring Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		21 Months Ended	36 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	May 05, 2018	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Feb. 03, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9.2	$ 9.5		$ 59.4	$ 35.6
Signet Path to Brillance
Restructuring Cost and Reserve [Line Items]
Restructuring plan, length			3 years
Restructuring charges	$ 10.6	$ 9.5		65.2	$ 98.8	$ 191.1
Cash payments				$ 66.7
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