CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Income Statement [Abstract]
Revenue	$ 1,050,756	$ 777,196	$ 3,028,488	$ 1,768,883
Cost of revenue	270,957	258,727	797,207	554,705
Gross profit	779,799	518,469	2,231,281	1,214,178
Operating expenses:
Research and development	98,508	42,582	245,994	111,705
Sales and marketing	293,698	190,157	810,544	470,886
General and administrative	96,736	93,488	362,971	227,856
Total operating expenses	488,942	326,227	1,419,509	810,447
Income from operations	290,857	192,242	811,772	403,731
Gains on strategic investments, net	122,421	0	154,497	2,538
Interest income and other, net	(2,995)	1,779	(3,171)	7,112
Income before provision for (benefit from) income taxes	410,283	194,021	963,098	413,381
Provision for (benefit from) income taxes	69,900	(4,621)	78,100	1,675
Net income	340,383	198,642	884,998	411,706
Undistributed earnings attributable to participating securities	(112)	(202)	(430)	(531)
Net income attributable to common stockholders	$ 340,271	$ 198,440	$ 884,568	$ 411,175
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$ 1.14	$ 0.70	$ 2.99	$ 1.46
Diluted (in dollars per share)	$ 1.11	$ 0.66	$ 2.89	$ 1.38
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	297,375,011	284,783,006	295,647,626	282,564,481
Diluted (in shares)	305,939,624	299,258,765	305,726,733	297,605,941