CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Net revenue:
Total net revenue	$ 885.7	$ 735.5
Cost of revenue:
Amortization of developed technology	7.4	9.2
Total cost of revenue	81.9	82.7
Gross profit	803.8	652.8
Operating expenses:
Marketing and sales	341.3	313.3
Research and development	217.4	205.6
General and administrative	104.8	99.1
Amortization of purchased intangibles	9.7	9.8
Restructuring and other exit costs, net	0.0	0.2
Total operating expenses	673.2	628.0
Income from operations	130.6	24.8
Interest and other expense, net	(40.1)	(16.2)
Income before income taxes	90.5	8.6
Provision for income taxes	(24.0)	(32.8)
Net income (loss)	$ 66.5	$ (24.2)
Basic net income (loss) per share (in usd per share)	$ 0.30	$ (0.11)
Diluted net income (loss) per share (in usd per share)	$ 0.30	$ (0.11)
Weighted average shares used in computing basic net income (loss) per share (in shares)	219.2	219.6
Weighted average shares used in computing diluted net income (loss) per share (in shares)	221.3	219.6
Subscription and Maintenance
Net revenue:
Total net revenue	$ 865.1	$ 707.8
Cost of revenue:
Cost of revenue	57.4	59.7
Subscription
Net revenue:
Total net revenue	803.0	595.8
Maintenance
Net revenue:
Total net revenue	62.1	112.0
Other
Net revenue:
Total net revenue	20.6	27.7
Cost of revenue:
Cost of revenue	$ 17.1	$ 13.8