CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Net revenue:
Net revenue	$ 3,274.3	$ 2,569.8	$ 2,056.6
Cost of revenue:
Amortization of developed technology	34.5	15.5	16.4
Total cost of revenue	324.9	285.9	303.4
Gross profit	2,949.4	2,283.9	1,753.2
Operating expenses:
Marketing and sales	1,310.3	1,183.9	1,087.3
Research and development	851.1	725.0	755.5
General and administrative	405.6	340.1	305.2
Amortization of purchased intangibles	38.9	18.0	20.2
Restructuring and other exit costs, net	0.5	41.9	94.1
Total operating expenses	2,606.4	2,308.9	2,262.3
Income (loss) from operations	343.0	(25.0)	(509.1)
Interest and other expense, net	(48.2)	(17.7)	(48.2)
Income (loss) before income taxes	294.8	(42.7)	(557.3)
Provision for income taxes	(80.3)	(38.1)	(9.6)
Net income (loss)	$ 214.5	$ (80.8)	$ (566.9)
Basic net income (loss) per share (in dollars per share)	$ 0.98	$ (0.37)	$ (2.58)
Diluted net income (loss) per share (in dollars per share)	$ 0.96	$ (0.37)	$ (2.58)
Weighted average shares used in computing basic net income (loss) per share (in shares)	219.7	218.9	219.5
Weighted average shares used in computing diluted net income (loss) per share (in shares)	222.5	218.9	219.5
Subscription and Maintenance
Net revenue:
Net revenue	$ 3,138.5	$ 2,437.4	$ 1,883.9
Cost of revenue:
Cost of revenue	223.9	216.0	214.4
Subscription
Net revenue:
Net revenue	2,751.9	1,802.3	894.3
Maintenance
Net revenue:
Net revenue	386.6	635.1	989.6
Other
Net revenue:
Net revenue	135.8	132.4	172.7
Cost of revenue:
Cost of revenue	$ 66.5	$ 54.4	$ 72.6