Pension Plans - Components of UK Net Asset Recognized (Details) - USD ($) $ in Millions	Jan. 30, 2016	Jan. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Non-current assets	$ 51.3	$ 37.0
Foreign Pension Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Non-current assets	51.3	37.0
Non-current liabilities	0.0	0.0
Net asset recognized	$ 51.3	$ 37.0