Income Taxes (Gross Uncertain Tax Positions Reconciliation) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Unrecognized tax benefit at beginning of period	$ 10.1	$ 7.2	$ 9.0	$ 9.4
Additions for current year tax positions			4.6
Additions for prior year tax positions			1.3
Decreases for prior year tax positions			(7.6)
Currency fluctuations	(0.7)		(0.1)	(0.4)
Unrecognized tax benefit at end of period	9.4		7.2	9.0
Unrecognized tax benefits that would affect effective tax rate, if recognized	$ 9.4		4.4	9.0
Valuation allowance			17.8	$ 21.9
Undistributed Earnings of Foreign Subsidiaries			68.8
Provision for undistributed earnings of foreign subsidiaries			$ 0.0
Deferred charges, amortization period			15 years
Forecast
Increase in equity if certain deferred tax assets are realized		$ 0.5
Other Current Assets
Deferred charges			$ 0.3
Other Assets
Deferred charges			7.6
Domestic
Operating loss carryforward			148.9
Foreign
Operating loss carryforward			88.1
Valuation allowance			66.1
State and Local
Operating loss carryforward			$ 97.9