Pension Plans - Components of Net Periodic Pension Cost (Details) - Foreign Pension Plan, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (2.0)	$ (2.6)	$ (2.3)
Interest cost	(7.2)	(7.7)	(9.7)
Expected return on UK Plan assets	10.4	11.5	14.7
Amortization of unrecognized actuarial losses	(1.5)	(3.4)	(2.0)
Amortization of unrecognized net prior service credits	1.9	2.2	1.7
Net periodic pension benefit	1.6	0.0	2.4
Other changes in assets and benefit obligations recognized in OCI	(17.8)	14.4	(21.0)
Total recognized in net periodic pension benefit (cost) and OCI	$ (16.2)	$ 14.4	$ (18.6)