CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Net revenue:
Total net revenue	$ 842.7	$ 660.9	$ 2,375.0	$ 1,832.5
Cost of revenue:
Amortization of developed technology	8.4	3.6	26.2	10.6
Total cost of revenue	79.5	72.3	241.7	208.9
Gross profit	763.2	588.6	2,133.3	1,623.6
Operating expenses:
Marketing and sales	330.7	297.6	960.8	863.1
Research and development	213.0	181.0	634.0	534.6
General and administrative	99.1	87.4	299.6	239.4
Amortization of purchased intangibles	9.7	4.2	29.2	11.8
Restructuring and other exit costs, net	0.1	3.7	0.5	40.0
Total operating expenses	652.6	573.9	1,924.1	1,688.9
Income (loss) from operations	110.6	14.7	209.2	(65.3)
Interest and other expense, net	(14.2)	(3.2)	(37.7)	(10.4)
Income (loss) before income taxes	96.4	11.5	171.5	(75.7)
Provision for income taxes	(29.7)	(35.2)	(88.8)	(69.8)
Net income (loss)	$ 66.7	$ (23.7)	$ 82.7	$ (145.5)
Basic net income (loss) per share (in usd per share)	$ 0.30	$ (0.11)	$ 0.38	$ (0.67)
Diluted net income (loss) per share (in usd per share)	$ 0.30	$ (0.11)	$ 0.37	$ (0.67)
Weighted average shares used in computing basic net income (loss) per share (in shares)	219.7	218.9	219.6	218.7
Weighted average shares used in computing diluted net income (loss) per share (in shares)	221.9	218.9	222.1	218.7
Subscription and Maintenance
Net revenue:
Total net revenue	$ 806.2	$ 631.4	$ 2,281.2	$ 1,750.0
Cost of revenue:
Cost of revenue	54.2	54.8	166.9	159.3
Subscription
Net revenue:
Total net revenue	715.0	481.3	1,974.5	1,252.3
Maintenance
Net revenue:
Total net revenue	91.2	150.1	306.7	497.7
Other
Net revenue:
Total net revenue	36.5	29.5	93.8	82.5
Cost of revenue:
Cost of revenue	$ 16.9	$ 13.9	$ 48.6	$ 39.0