CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Net revenue:
Subscription	$ 322.0	$ 319.0	$ 648.0	$ 638.8
License and other	228.7	290.5	414.6	617.2
Total net revenue	550.7	609.5	1,062.6	1,256.0
Cost of revenue:
Cost of subscription revenue	38.2	40.0	78.0	78.7
Cost of license and other revenue	46.9	53.0	99.5	106.1
Total cost of revenue	85.1	93.0	177.5	184.8
Gross profit	465.6	516.5	885.1	1,071.2
Operating expenses:
Marketing and sales	243.1	240.8	483.9	494.7
Research and development	193.0	193.1	386.5	387.6
General and administrative	68.6	70.1	143.3	146.0
Amortization of purchased intangibles	7.8	8.2	15.7	17.1
Restructuring charges and other facility exit costs, net	16.0	0.0	68.3	0.0
Total operating expenses	528.5	512.2	1,097.7	1,045.4
(Loss) income from operations	(62.9)	4.3	(212.6)	25.8
Interest and other expense, net	(10.1)	(3.4)	(13.7)	(3.1)
(Loss) income before income taxes	(73.0)	0.9	(226.3)	22.7
Provision for income taxes	(25.2)	(269.5)	(39.6)	(272.2)
Net loss	$ (98.2)	$ (268.6)	$ (265.9)	$ (249.5)
Basic net loss per share (in usd per share)	$ (0.44)	$ (1.18)	$ (1.19)	$ (1.10)
Diluted net loss per share (in usd per share)	$ (0.44)	$ (1.18)	$ (1.19)	$ (1.10)
Weighted average shares used in computing basic net loss per share (shares)	223.2	227.0	223.8	227.1
Weighted average shares used in computing diluted net loss per share (shares)	223.2	227.0	223.8	227.1