Net Income Per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Denominator:
Weighted-average shares used in computing net income per share, basic (in shares)	300,503,787	307,981,971	300,748,162
Weighted-average shares used in computing net income per share, diluted (in shares)	307,333,185	315,069,582	308,519,897
Net income per share, basic (in dollars per share)	$ 6.32	$ 3.28	$ 2.12
Net income per share, diluted (in dollars per share)	$ 6.18	$ 3.21	$ 2.07
Class A
Numerator:
Net income, basic	$ 1,679,924	$ 861,755	$ 538,554
Reallocation of net income	(5,267)	(5,170)	(4,653)
Net income, diluted	$ 1,674,657	$ 856,585	$ 533,901
Denominator:
Weighted-average shares used in computing net income per share, basic (in shares)	265,676,002	262,715,505	254,084,540
Weighted-average shares used in computing net income per share, diluted (in shares)	270,861,859	267,148,873	258,398,674
Net income per share, basic (in dollars per share)	$ 6.32	$ 3.28	$ 2.12
Net income per share, diluted (in dollars per share)	$ 6.18	$ 3.21	$ 2.07
Class B
Numerator:
Net income, basic	$ 220,224	$ 148,483	$ 98,908
Reallocation of net income	5,267	5,170	4,653
Net income, diluted	$ 225,491	$ 153,653	$ 103,561
Denominator:
Weighted-average shares used in computing net income per share, basic (in shares)	34,827,785	45,266,466	46,663,622
Weighted-average shares used in computing net income per share, diluted (in shares)	36,471,326	47,920,709	50,121,223
Net income per share, basic (in dollars per share)	$ 6.32	$ 3.28	$ 2.12
Net income per share, diluted (in dollars per share)	$ 6.18	$ 3.21	$ 2.07