Pension Plans - Change in UK Benefit Obligation (Details) - Foreign Pension Plan, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 214.9	$ 258.8
Service cost	2.0	2.6	$ 2.3
Past service cost	0.5	0.6
Interest cost	7.2	7.7	9.7
Members’ contributions	0.6	0.7
Actuarial (gain) loss	24.1	(29.4)
Benefits paid	(9.9)	(11.2)
Foreign currency translation	(23.7)	(14.9)
Benefit obligation at end of year	215.7	214.9	$ 258.8
Funded status at end of year	$ 31.9	$ 51.3