Business and Summary of Significant Accounting Policies - Reclassifications (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Business and Summary of Significant Accounting Policies [Abstract]
Decrease to License and other revenue	$ (26.5)	$ (23.2)
Increase to Subscription revenue	26.5	23.2
Decrease to Cost of license and other revenue	(32.1)	(20.5)
Increase to Cost of subscription revenue	$ 32.1	$ 20.5