Business and Summary of Significant Accounting Policies Business and Summary of Significant Accounting Policies(Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Business and Summary of Significant Accounting Policies [Line Items]
Accumulated Other Comprehensive Income Loss Tax	$ 23.0	$ 23.0	$ 23.0
Product Warranty Period	2 years
Capitalized software and development costs | Maximum
Business and Summary of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Capitalized software and development costs | Minimum [Member]
Business and Summary of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years