CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Net revenue:
Net revenue	$ 3,790.4	$ 3,274.3	$ 2,569.8
Cost of revenue:
Amortization of developed technologies	30.9	34.5	15.5
Total cost of revenue	337.1	324.9	285.9
Gross profit	3,453.3	2,949.4	2,283.9
Operating expenses:
Marketing and sales	1,440.3	1,310.3	1,183.9
Research and development	932.5	851.1	725.0
General and administrative	413.9	405.6	340.1
Amortization of purchased intangibles	37.5	38.9	18.0
Restructuring and other exit costs, net	0.0	0.5	41.9
Total operating expenses	2,824.2	2,606.4	2,308.9
Income (loss) from operations	629.1	343.0	(25.0)
Interest and other expense, net	(82.4)	(48.2)	(17.7)
Income (loss) before income taxes	546.7	294.8	(42.7)
Benefit (provision) for income taxes	661.5	(80.3)	(38.1)
Net income (loss)	$ 1,208.2	$ 214.5	$ (80.8)
Basic net income (loss) per share (in dollars per share)	$ 5.51	$ 0.98	$ (0.37)
Diluted net income (loss) per share (in dollars per share)	$ 5.44	$ 0.96	$ (0.37)
Weighted average shares used in computing basic net income (loss) per share (in shares)	219.4	219.7	218.9
Weighted average shares used in computing diluted net income (loss) per share (in shares)	222.1	222.5	218.9
Subscription and Maintenance
Net revenue:
Net revenue	$ 3,662.2	$ 3,138.5	$ 2,437.4
Cost of revenue:
Cost of revenue	242.1	223.9	216.0
Subscription
Net revenue:
Net revenue	3,478.9	2,751.9	1,802.3
Maintenance
Net revenue:
Net revenue	183.3	386.6	635.1
Other
Net revenue:
Net revenue	128.2	135.8	132.4
Cost of revenue:
Cost of revenue	$ 64.1	$ 66.5	$ 54.4