CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Net revenue:
Total net revenue	$ 796.8	$ 611.7	$ 1,532.3	$ 1,171.6
Cost of revenue:
Amortization of developed technology	8.6	3.4	17.8	7.0
Total cost of revenue	79.5	69.8	162.2	136.6
Gross profit	717.3	541.9	1,370.1	1,035.0
Operating expenses:
Marketing and sales	316.8	289.1	630.1	565.5
Research and development	215.4	180.8	421.0	353.6
General and administrative	101.4	79.1	200.5	152.0
Amortization of purchased intangibles	9.7	3.8	19.5	7.6
Restructuring and other exit costs, net	0.2	13.8	0.4	36.3
Total operating expenses	643.5	566.6	1,271.5	1,115.0
Income (loss) from operations	73.8	(24.7)	98.6	(80.0)
Interest and other (expense) income, net	(7.3)	1.3	(23.5)	(7.2)
Income (loss) before income taxes	66.5	(23.4)	75.1	(87.2)
Provision for income taxes	(26.3)	(16.0)	(59.1)	(34.6)
Net income (loss)	$ 40.2	$ (39.4)	$ 16.0	$ (121.8)
Basic net income (loss) per share (in usd per share)	$ 0.18	$ (0.18)	$ 0.07	$ (0.56)
Diluted net income (loss) per share (in usd per share)	$ 0.18	$ (0.18)	$ 0.07	$ (0.56)
Weighted average shares used in computing basic net income (loss) per share (shares)	219.6	219.0	219.6	218.8
Weighted average shares used in computing diluted net income (loss) per share (shares)	222.4	219.0	222.3	218.8
Subscription and Maintenance
Net revenue:
Total net revenue	$ 767.2	$ 587.0	$ 1,475.0	$ 1,118.6
Cost of revenue:
Cost of revenue	53.0	54.1	112.7	104.5
Subscription
Net revenue:
Total net revenue	663.7	420.6	1,259.5	771.0
Maintenance
Net revenue:
Total net revenue	103.5	166.4	215.5	347.6
Other
Net revenue:
Total net revenue	29.6	24.7	57.3	53.0
Cost of revenue:
Cost of revenue	$ 17.9	$ 12.3	$ 31.7	$ 25.1