Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Apr. 30, 2018	Jan. 31, 2018
Consolidated Balance Sheets
Accounts receivable - trade, allowance for doubtful accounts	$ 11.9	$ 12.0
Property and equipment, accumulated depreciation	$ 199.9	$ 191.1
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	54,600,000	54,600,000
Treasury stock	3,800,000	3,800,000