Net Income Per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Numerator:
Net income	$ 48,353	$ 340,383	$ 207,761	$ 884,998
Net income attributable to common stockholders	$ 48,353	$ 340,271	$ 207,744	$ 884,568
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	295,537,026	297,375,011	297,765,848	295,647,626
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	301,986,341	305,939,624	305,273,812	305,726,733
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.16	$ 1.14	$ 0.70	$ 2.99
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.16	$ 1.11	$ 0.68	$ 2.89
Class A Common Stock
Numerator:
Net income	$ 40,726	$ 276,024	$ 174,835	$ 707,188
Less: undistributed earnings attributable to participating securities	0	0	0	0
Net income attributable to common stockholders	40,726	276,024	174,835	707,188
Reallocation of net income attributable to common stockholders	(568)	(5,756)	(2,516)	(15,965)
Net income attributable to common stockholders, diluted	$ 40,158	$ 270,268	$ 172,319	$ 691,223
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	248,917,590	241,227,457	250,595,877	236,362,585
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	250,803,759	243,024,399	253,217,436	238,904,473
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.16	$ 1.14	$ 0.70	$ 2.99
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.16	$ 1.11	$ 0.68	$ 2.89
Class B Common Stock
Numerator:
Net income	$ 7,627	$ 64,359	$ 32,926	$ 177,810
Less: undistributed earnings attributable to participating securities	0	(112)	(17)	(430)
Net income attributable to common stockholders	7,627	64,247	32,909	177,380
Reallocation of net income attributable to common stockholders	568	5,756	2,516	15,965
Net income attributable to common stockholders, diluted	$ 8,195	$ 70,003	$ 35,425	$ 193,345
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic (in shares)	46,619,436	56,147,554	47,169,971	59,285,041
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares)	51,182,582	62,915,225	52,056,376	66,822,260
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.16	$ 1.14	$ 0.70	$ 2.99
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.16	$ 1.11	$ 0.68	$ 2.89