Pension Plans - Fair Value of Unfunded, Non-qualified Deferred Compensation Plans Assets (Details) - USD ($) $ in Millions	Feb. 03, 2018	Jan. 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 37.5	$ 37.1
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	30.2	29.6
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	7.3	7.5
Corporate-owned life insurance plans
Defined Benefit Plan Disclosure [Line Items]
Total assets	7.3	7.5
Corporate-owned life insurance plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	7.3	7.5
Money market funds
Defined Benefit Plan Disclosure [Line Items]
Total assets	30.2	29.6
Money market funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 30.2	$ 29.6