CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Net revenue:
Total net revenue		$ 611.7	$ 501.8	$ 1,171.6	$ 987.5
Cost of revenue:
Amortization of developed technology		3.4	4.0	7.0	8.7
Total cost of revenue		69.8	74.6	136.6	152.8
Gross profit		541.9	427.2	1,035.0	834.7
Operating expenses:
Marketing and sales		289.1	257.6	565.5	513.3
Research and development		180.8	193.8	353.6	381.5
General and administrative		79.1	78.0	152.0	156.3
Amortization of purchased intangibles		3.8	4.9	7.6	10.6
Restructuring and other exit costs, net		13.8	0.5	36.3	0.2
Total operating expenses		566.6	534.8	1,115.0	1,061.9
Loss from operations		(24.7)	(107.6)	(80.0)	(227.2)
Interest and other income (expense), net		1.3	(18.8)	(7.2)	(20.6)
Loss before income taxes		(23.4)	(126.4)	(87.2)	(247.8)
Provision for income taxes		(16.0)	(17.6)	(34.6)	(25.8)
Net loss		$ (39.4)	$ (144.0)	$ (121.8)	$ (273.6)
Basic net loss per share (in usd per share)		$ (0.18)	$ (0.66)	$ (0.56)	$ (1.25)
Diluted net loss per share (in usd per share)		$ (0.18)	$ (0.66)	$ (0.56)	$ (1.25)
Weighted average shares used in computing basic net loss per share (shares)		219.0	219.5	218.8	219.7
Weighted average shares used in computing diluted net loss per share (shares)		219.0	219.5	218.8	219.7
Subscription and Maintenance
Net revenue:
Total net revenue		$ 587.0	$ 457.9	$ 1,118.6	$ 894.9
Cost of revenue:
Cost of revenue		54.1	52.8	104.5	107.7
Subscription
Net revenue:
Total net revenue		420.6	196.1	771.0	369.5
Maintenance
Net revenue:
Total net revenue		166.4	261.8	347.6	525.4
Other
Net revenue:
Total net revenue	[1]	24.7	43.9	53.0	92.6
Cost of revenue:
Cost of revenue	[2]	$ 12.3	$ 17.8	$ 25.1	$ 36.4

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

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