CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Net revenue:
Total net revenue	$ 952.4	$ 842.7	$ 2,751.2	$ 2,375.0
Cost of revenue:
Amortization of developed technology	7.6	8.4	22.4	26.2
Total cost of revenue	83.7	79.5	246.5	241.7
Gross profit	868.7	763.2	2,504.7	2,133.3
Operating expenses:
Marketing and sales	359.3	330.7	1,051.5	960.8
Research and development	233.0	213.0	682.9	634.0
General and administrative	98.8	99.1	296.8	299.6
Amortization of purchased intangibles	9.6	9.7	28.8	29.2
Restructuring and other exit costs, net	0.0	0.1	0.0	0.5
Total operating expenses	700.7	652.6	2,060.0	1,924.1
Income from operations	168.0	110.6	444.7	209.2
Interest and other expense, net	(11.9)	(14.2)	(69.1)	(37.7)
Income before income taxes	156.1	96.4	375.6	171.5
Provision for income taxes	(23.9)	(29.7)	(78.7)	(88.8)
Net income	$ 132.2	$ 66.7	$ 296.9	$ 82.7
Basic net income (loss) per share (in usd per share)	$ 0.60	$ 0.30	$ 1.35	$ 0.38
Diluted net income (loss) per share (in usd per share)	$ 0.59	$ 0.30	$ 1.34	$ 0.37
Weighted average shares used in computing basic net income (loss) per share (in shares)	219.6	219.7	219.4	219.6
Weighted average shares used in computing diluted net income (loss) per share (in shares)	222.3	221.9	222.1	222.1
Subscription and Maintenance
Net revenue:
Total net revenue	$ 924.2	$ 806.2	$ 2,681.7	$ 2,281.2
Cost of revenue:
Cost of revenue	60.7	54.2	176.6	166.9
Subscription
Net revenue:
Total net revenue	884.4	715.0	2,528.6	1,974.5
Maintenance
Net revenue:
Total net revenue	39.8	91.2	153.1	306.7
Other
Net revenue:
Total net revenue	28.2	36.5	69.5	93.8
Cost of revenue:
Cost of revenue	$ 15.4	$ 16.9	$ 47.5	$ 48.6