CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Net revenue:
Total net revenue	$ 989.3	$ 885.7
Cost of revenue:
Amortization of developed technologies	10.2	7.4
Total cost of revenue	92.8	81.9
Gross profit	896.5	803.8
Operating expenses:
Marketing and sales	377.1	341.3
Research and development	265.5	217.4
General and administrative	111.9	104.8
Amortization of purchased intangibles	8.2	9.7
Total operating expenses	762.7	673.2
Income from operations	133.8	130.6
Interest and other expense, net	(2.4)	(40.1)
Income before income taxes	131.4	90.5
Benefit (provision) for income taxes	24.2	(24.0)
Net income	$ 155.6	$ 66.5
Basic net income per share (in usd per share)	$ 0.71	$ 0.30
Diluted net income per share (in usd per share)	$ 0.70	$ 0.30
Weighted average shares used in computing basic net income per share (in shares)	219.6	219.2
Weighted average shares used in computing diluted net income per share (in shares)	222.0	221.3
Subscription and Maintenance
Net revenue:
Total net revenue	$ 966.6	$ 865.1
Cost of revenue:
Cost of revenue	68.5	57.4
Subscription
Net revenue:
Total net revenue	947.5	803.0
Maintenance
Net revenue:
Total net revenue	19.1	62.1
Other
Net revenue:
Total net revenue	22.7	20.6
Cost of revenue:
Cost of revenue	$ 14.1	$ 17.1