Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	[1]	Jan. 31, 2017	[1]
Revenue:
Revenue:	$ 1,359,824	$ 1,024,762		$ 739,171
Cost of revenue:
Total cost of revenue	457,528	353,781		252,279
Gross profit	902,296	670,981		486,892
Operating expenses:
Research and development	349,936	279,196		245,817
Sales and marketing	584,111	464,049		347,695
General and administrative	137,506	95,170		84,652
Legal settlement	0	0		30,000
Total operating expenses	1,071,553	838,415		708,164
Loss from operations	(169,257)	(167,434)		(221,272)
Other income (expense), net	(8,016)	11,445		1,627
Loss before provision for income taxes	(177,273)	(155,989)		(219,645)
Provision for income taxes	1,089	3,889		1,887
Net loss	$ (178,362)	$ (159,878)	[2],[3]	$ (221,532)	[2],[3]
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.77)	$ (0.76)		$ (1.14)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	232,042	211,609		194,714
Product
Revenue:
Revenue:	$ 1,075,586	$ 834,454		$ 614,458
Cost of revenue:
Cost of revenue:	352,054	275,242		194,150
Support subscription
Revenue:
Revenue:	284,238	190,308		124,713
Cost of revenue:
Cost of revenue:	$ 105,474	$ 78,539		$ 58,129

[1] *As adjusted to reflect the impact of the full retrospective adoption of ASC 606 - see Note 2.

[2] * As adjusted to reflect the impact of ASU 2016-18 and the full retrospective adoption of

[3] * As adjusted to reflect the impact of the full retrospective adoption of ASC 606 - see Note 2.