Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue:
License	$ 209.2	$ 229.7	$ 380.8	$ 419.2
Maintenance	285.4	270.5	564.2	535.1
Professional services	53.6	56.5	107.6	104.8
Total revenue	548.2	556.7	1,052.6	1,059.1
Operating expenses:
Cost of license revenue	40.5	39.3	79.8	77.6
Cost of maintenance revenue	53.0	49.5	103.9	93.3
Cost of professional services revenue	54.5	53.2	112.2	100.6
Selling and marketing expenses	163.1	153.5	327.8	298.2
Research and development expenses	32.3	38.3	74.6	83.0
General and administrative expenses	55.9	51.0	118.9	109.6
Amortization of intangible assets	10.9	10.9	23.5	20.7
Total operating expenses	410.2	395.7	840.7	783.0
Operating income	138.0	161.0	211.9	276.1
Other income (loss), net:
Interest and other income, net	3.5	2.6	5.8	6.4
Interest expense	(10.6)	(5.2)	(20.8)	(10.7)
Gain (loss) on investments, net	0.7	(2.2)	0.3	(2.1)
Total other loss, net	(6.4)	(4.8)	(14.7)	(6.4)
Earnings before income taxes	131.6	156.2	197.2	269.7
Provision for income taxes	33.8	41.5	45.2	59.3
Net earnings	97.8	114.7	152.0	210.4
Basic earnings per share	$ 0.62	$ 0.66	$ 0.96	$ 1.20
Diluted earnings per share	$ 0.61	$ 0.65	$ 0.94	$ 1.18
Shares used in computing basic earnings per share	157.5	173.0	158.9	174.7
Shares used in computing diluted earnings per share	160.3	176.0	162.1	178.3
Net earnings	97.8	114.7	152.0	210.4
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax provision (benefit) of $1.0, $(0.8), $2.6 and $(0.4), respectively	5.1	(41.5)	(24.1)	(33.3)
Unrealized loss on available-for-sale securities, net of tax provision (benefit) of $0, $(0.3), $(0.3) and $(0.3), respectively		(0.7)	(0.4)	(0.8)
Total other comprehensive income (loss)	5.1	(42.2)	(24.5)	(34.1)
Total comprehensive income	$ 102.9	$ 72.5	$ 127.5	$ 176.3