Net Income Per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Denominator:
Weighted-average shares used in computing net income per share, basic (in shares)	292,879,238	301,779,114	293,688,378	303,354,835
Weighted-average shares used in computing net income per share, diluted (in shares)	299,746,342	308,224,372	300,021,287	310,515,069
Net income per share, basic (in dollars per share)	$ 5.27	$ 1.19	$ 6.70	$ 2.02
Net income per share, diluted (in dollars per share)	$ 5.15	$ 1.16	$ 6.56	$ 1.97
Class A
Numerator:
Net income, basic	$ 1,391,787	$ 316,729	$ 1,776,153	$ 534,869
Reallocation of net income	(1,901)	(1,123)	(3,409)	(1,740)
Net income, diluted	$ 1,389,886	$ 315,606	$ 1,772,744	$ 533,129
Denominator:
Weighted-average shares used in computing net income per share, basic (in shares)	264,272,327	266,548,290	265,042,232	264,605,839
Weighted-average shares used in computing net income per share, diluted (in shares)	270,099,315	271,276,534	270,237,744	269,970,487
Net income per share, basic (in dollars per share)	$ 5.27	$ 1.19	$ 6.70	$ 2.02
Net income per share, diluted (in dollars per share)	$ 5.15	$ 1.16	$ 6.56	$ 1.97
Class B
Numerator:
Net income, basic	$ 150,658	$ 41,863	$ 191,969	$ 78,326
Reallocation of net income	1,901	1,123	3,409	1,740
Net income, diluted	$ 152,559	$ 42,986	$ 195,378	$ 80,066
Denominator:
Weighted-average shares used in computing net income per share, basic (in shares)	28,606,911	35,230,824	28,646,146	38,748,996
Weighted-average shares used in computing net income per share, diluted (in shares)	29,647,027	36,947,838	29,783,543	40,544,582
Net income per share, basic (in dollars per share)	$ 5.27	$ 1.19	$ 6.70	$ 2.02
Net income per share, diluted (in dollars per share)	$ 5.15	$ 1.16	$ 6.56	$ 1.97