CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Net revenue:
Total net revenue		$ 660.9	$ 515.3	$ 1,832.5	$ 1,502.8
Cost of revenue:
Amortization of developed technology		3.6	4.0	10.6	12.7
Total cost of revenue		72.3	77.5	208.9	230.3
Gross profit		588.6	437.8	1,623.6	1,272.5
Operating expenses:
Marketing and sales		297.6	272.5	863.1	785.8
Research and development		181.0	191.8	534.6	573.3
General and administrative		87.4	68.8	239.4	225.1
Amortization of purchased intangibles		4.2	4.7	11.8	15.3
Restructuring and other exit costs, net		3.7	0.0	40.0	0.2
Total operating expenses		573.9	537.8	1,688.9	1,599.7
Income (loss) from operations		14.7	(100.0)	(65.3)	(327.2)
Interest and other expense, net		(3.2)	(11.2)	(10.4)	(31.8)
Income (loss) before income taxes		11.5	(111.2)	(75.7)	(359.0)
Provision for income taxes		(35.2)	(8.6)	(69.8)	(34.4)
Net loss		$ (23.7)	$ (119.8)	$ (145.5)	$ (393.4)
Basic net loss per share (in usd per share)		$ (0.11)	$ (0.55)	$ (0.67)	$ (1.79)
Diluted net loss per share (in usd per share)		$ (0.11)	$ (0.55)	$ (0.67)	$ (1.79)
Weighted average shares used in computing basic net loss per share (shares)		218.9	219.6	218.7	219.7
Weighted average shares used in computing diluted net loss per share (shares)		218.9	219.6	218.7	219.7
Subscription and Maintenance
Net revenue:
Total net revenue		$ 631.4	$ 475.5	$ 1,750.0	$ 1,370.4
Cost of revenue:
Cost of revenue		54.8	53.9	159.3	161.6
Subscription
Net revenue:
Total net revenue		481.3	231.1	1,252.3	600.6
Maintenance
Net revenue:
Total net revenue		150.1	244.4	497.7	769.8
Other
Net revenue:
Total net revenue	[1]	29.5	39.8	82.5	132.4
Cost of revenue:
Cost of revenue	[2]	$ 13.9	$ 19.6	$ 39.0	$ 56.0

[1] Previously labeled as "License and other" in prior periods.

[2] Previously labeled as "Cost of license and other revenue" in prior periods.