Other Assets - Components of Other Assets (Detail) - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred ESP selling costs	$ 86.1	$ 79.4
Investments	27.2	26.8
Other assets	51.8	48.4
Total other assets	165.1	154.6
Deferred costs related to the sale of the extended service plan	$ 29.4	$ 26.4