Basis of Presentation Reclassification (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 31, 2012	Jul. 31, 2012
Reclassification [Abstract]
Decrease to Cost of License and Other Revenue (for Reclass)	$ (6.6)	$ (12.9)
Increase to Subscription Revenue (for Reclass)	6.5	12.3
Decrease to License and Other Revenue (for Reclass)	(6.5)	(12.3)
Increase to Cost of Subscription Revenue (for Reclass)	$ 6.6	$ 12.9