CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Net revenue:
Subscription	$ 319.5	$ 318.9	$ 967.5	$ 957.7
License and other	170.1	280.9	584.7	898.1
Total net revenue	489.6	599.8	1,552.2	1,855.8
Cost of revenue:
Cost of subscription revenue	35.1	38.0	113.1	116.7
Cost of license and other revenue	46.4	53.0	145.9	159.1
Total cost of revenue	81.5	91.0	259.0	275.8
Gross profit	408.1	508.8	1,293.2	1,580.0
Operating expenses:
Marketing and sales	255.0	243.4	738.9	738.1
Research and development	192.6	197.9	579.1	585.5
General and administrative	70.4	74.2	213.7	220.2
Amortization of purchased intangibles	6.8	8.1	22.5	25.2
Restructuring charges and other facility exit costs, net	3.2	0.0	71.5	0.0
Total operating expenses	528.0	523.6	1,625.7	1,569.0
(Loss) income from operations	(119.9)	(14.8)	(332.5)	11.0
Interest and other expense, net	(9.4)	(7.7)	(23.1)	(10.8)
(Loss) income before income taxes	(129.3)	(22.5)	(355.6)	0.2
Provision for income taxes	(13.5)	(21.3)	(53.1)	(293.5)
Net loss	$ (142.8)	$ (43.8)	$ (408.7)	$ (293.3)
Basic net loss per share (in usd per share)	$ (0.64)	$ (0.19)	$ (1.83)	$ (1.29)
Diluted net loss per share (in usd per share)	$ (0.64)	$ (0.19)	$ (1.83)	$ (1.29)
Weighted average shares used in computing basic net loss per share (shares)	222.3	225.3	223.3	226.5
Weighted average shares used in computing diluted net loss per share (shares)	222.3	225.3	223.3	226.5