Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jan. 31, 2016	Jan. 31, 2015
Consolidated Balance Sheets
Accounts receivable - trade, allowance for doubtful accounts	$ 11.3	$ 8.0
Property and equipment, accumulated depreciation	$ 109.3	$ 67.1
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	53,300,000	52,800,000
Treasury stock	0.4	0