CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Allowance for doubtful accounts receivable, current	$ 17.2	$ 11.5
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2.0	2.0
Preferred Stock, shares issued	0.0	0.0
Preferred Stock, shares outstanding	0.0	0.0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	240.0	240.0
Common Stock, shares issued	124.5	124.5
Common Stock, shares outstanding	124.5	124.5