Pension Plans - Fair Value of Unfunded, Non-qualified Deferred Compensation Plans Assets (Details) - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 37.1	$ 33.4
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	29.6	25.1
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	7.5	8.3
Corporate-owned life insurance plans
Defined Benefit Plan Disclosure [Line Items]
Total assets	7.5	8.3
Corporate-owned life insurance plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	7.5	8.3
Money market funds
Defined Benefit Plan Disclosure [Line Items]
Total assets	29.6	25.1
Money market funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 29.6	$ 25.1