Pension Plans - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Net curtailment gain and settlement loss	$ 3.7	$ 0.0	$ 0.0
Pension plan | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	(2.1)	(2.0)	(2.6)
Interest cost	(6.1)	(7.2)	(7.7)
Expected return on UK Plan assets	9.4	10.4	11.5
Amortization of unrecognized actuarial losses	(2.8)	(1.5)	(3.4)
Amortization of unrecognized net prior service credits	1.4	1.9	2.2
Net curtailment gain and settlement loss	3.7	0.0	0.0
Net periodic pension benefit	3.5	1.6	0.0
Other changes in assets and benefit obligations recognized in OCI	(2.9)	(17.8)	14.4
Total recognized in net periodic pension benefit (cost) and OCI	$ 0.6	$ (16.2)	$ 14.4