CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010
Net revenue:
License and other	$ 331.4	$ 282.0	$ 987.4	$ 842.5
Maintenance	217.2	194.7	635.8	581.6
Total net revenue	548.6	476.7	1,623.2	1,424.1
Cost of revenue:
Cost of license and other revenue	50.5	40.3	138.8	122.0
Cost of maintenance revenue	9.1	8.2	32.8	26.2
Total cost of revenue	59.6	48.5	171.6	148.2
Gross profit	489.0	428.2	1,451.6	1,275.9
Operating expenses:
Marketing and sales	206.2	185.1	609.1	549.1
Research and development	141.2	122.8	417.0	369.3
General and administrative	51.4	51.1	163.0	148.7
Restructuring			(1.3)	9.0
Total operating expenses	398.8	359.0	1,187.8	1,076.1
Income from operations	90.2	69.2	263.8	199.8
Interest and other income (expense), net	1.1	2.5	6.2	(0.8)
Income before income taxes	91.3	71.7	270.0	199.0
Provision for income taxes	(18.5)	(18.1)	(56.7)	(48.6)
Net income	$ 72.8	$ 53.6	$ 213.3	$ 150.4
Basic net income per share	$ 0.32	$ 0.24	$ 0.93	$ 0.66
Diluted net income per share	$ 0.32	$ 0.23	$ 0.91	$ 0.64
Weighted average shares used in computing basic net income per share	227.1	226.5	228.2	227.9
Weighted average shares used in computing diluted net income per share	230.7	232.4	233.7	233.4