CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Net revenue:
Net revenue		$ 2,569.8	$ 2,056.6	$ 2,031.0
Cost of revenue:
Amortization of developed technology		15.5	16.4	40.0
Total cost of revenue		285.9	303.4	341.9
Gross profit		2,283.9	1,753.2	1,689.1
Operating expenses:
Marketing and sales		1,183.9	1,087.3	1,022.5
Research and development		725.0	755.5	766.1
General and administrative		340.1	305.2	287.8
Amortization of purchased intangibles		18.0	20.2	31.8
Restructuring and other exit costs, net		41.9	94.1	80.5
Total operating expenses		2,308.9	2,262.3	2,188.7
Loss from operations		(25.0)	(509.1)	(499.6)
Interest and other expense, net		(17.7)	(48.2)	(24.2)
Loss before income taxes		(42.7)	(557.3)	(523.8)
Provision for income taxes		(38.1)	(9.6)	(58.3)
Net loss		$ (80.8)	$ (566.9)	$ (582.1)
Basic net loss per share (in dollars per share)		$ (0.37)	$ (2.58)	$ (2.61)
Diluted net loss per share (in dollars per share)		$ (0.37)	$ (2.58)	$ (2.61)
Weighted average shares used in computing basic net loss per share (in shares)		218.9	219.5	222.7
Weighted average shares used in computing diluted net loss per share (in shares)		218.9	219.5	222.7
Subscription and Maintenance
Net revenue:
Net revenue		$ 2,437.4	$ 1,883.9	$ 1,546.2
Cost of revenue:
Cost of revenue		216.0	214.4	191.7
Subscription
Net revenue:
Net revenue		1,802.3	894.3	443.1
Maintenance
Net revenue:
Net revenue		635.1	989.6	1,103.1
Other
Net revenue:
Net revenue	[1]	132.4	172.7	484.8
Cost of revenue:
Cost of revenue	[2]	$ 54.4	$ 72.6	$ 110.2

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

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