Other Assets - Components of Other Assets (Detail) - USD ($) $ in Millions	Feb. 03, 2018	Jan. 28, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred ESP selling costs	$ 89.5	$ 86.1
Investments	27.9	27.2
Other assets	53.8	51.8
Total other assets	171.2	165.1
Deferred costs related to the sale of the extended service plan	$ 30.9	$ 29.4