Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Expense Benefit Continuing Operations Discrete Items	$ 9.7	$ 8.6
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 5.9