Business and Summary of Significant Accounting Policies - Reclassifications (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Accounting Policies [Abstract]
Decrease to License and other revenue		$ (26.5)
Increase to Subscription revenue		26.5
Decrease to Cost of license and other revenue		(32.1)
Increase to Cost of subscription revenue		32.1
(Decrease) to general and administrative	(36.5)	(42.1)
Increase to amortization of purchased intangibles	$ 36.5	$ 42.1