CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jul. 31, 2015	Jan. 31, 2015	Jul. 31, 2014
Allowance for doubtful accounts receivable, current	$ 9.8	$ 10.6	$ 9.5
Preferred Stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2.0	2.0	2.0
Preferred Stock, shares issued
Preferred Stock, shares outstanding
Common Stock, par value	$ 0.01	$ 0.01	$ 0.01
Common Stock, shares authorized	240.0	240.0	240.0
Common Stock, shares issued	128.9	129.3	129.3
Common Stock, shares outstanding	128.9	129.3	129.3