Restructuring and Related Activities (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Aug. 02, 2020	Aug. 02, 2020
COVID-19 Pandemic Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 9.8
COVID-19 Pandemic Costs | Restructuring and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		8.9
COVID-19 Pandemic Costs | Cost of Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0.9
Ceased Use of Certain Leased Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7.5	7.5
One-time Involuntary Termination Benefit Costs | Restructuring and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0.8	$ 6.6