Pension Plans - Change in UK Plan Assets (Details) - Foreign Pension Plan, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	$ 266.2	$ 295.8
Actual return on UK Plan assets	18.2	(4.8)
Employer contributions	3.3	2.5
Members’ contributions	0.6	0.7
Benefits paid	(9.9)	(11.2)
Foreign currency translation	(30.8)	(16.8)
Fair value at end of year	$ 247.6	$ 266.2