CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Net revenue:
Subscription	$ 1,290.0	$ 1,277.2	$ 1,170.8
License and other	741.0	1,226.9	1,341.4
Total net revenue	2,031.0	2,504.1	2,512.2
Cost of revenue:
Cost of subscription revenue	151.3	156.1	133.6
Cost of license and other revenue	190.6	214.6	208.5
Total cost of revenue	341.9	370.7	342.1
Gross profit	1,689.1	2,133.4	2,170.1
Operating expenses:
Marketing and sales	1,022.5	1,015.5	998.0
Research and development	766.1	790.0	725.2
General and administrative	287.8	293.4	283.3
Amortization of purchased intangibles	31.8	33.2	39.8
Restructuring charges and other facility exit costs, net	80.5	0.0	3.1
Total operating expenses	2,188.7	2,132.1	2,049.4
(Loss) income from operations	(499.6)	1.3	120.7
Interest and other expense, net	(24.2)	(21.6)	(37.7)
(Loss) income before income taxes	(523.8)	(20.3)	83.0
Provision for income taxes	(58.3)	(310.2)	(1.2)
Net (loss) income	$ (582.1)	$ (330.5)	$ 81.8
Basic net (loss) income per share (usd per share)	$ (2.61)	$ (1.46)	$ 0.36
Diluted net (loss) income per share (usd per share)	$ (2.61)	$ (1.46)	$ 0.35
Weighted average shares used in computing basic net (loss) income per share (in shares)	222.7	226.0	227.1
Weighted average shares used in computing diluted net (loss) income per share (in shares)	222.7	226.0	232.4