Segment Information - Schedule of Significant Segment Expenses and Other Segment Items (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Segment Reporting Information [Line Items]
Revenue	$ 1,217,227	$ 1,162,520	$ 2,391,942	$ 2,303,754
Stock-based compensation expense	188,699	237,950	390,268	467,375
Provision for income taxes	89,570	73,874	150,732	149,530
Net income	358,592	219,015	613,195	435,323
Operating Segments | Reportable Segment
Segment Reporting Information [Line Items]
Revenue	1,217,227	1,162,520	2,391,942	2,303,754
Adjusted cost of revenue	245,413	249,315	490,044	485,453
Adjusted research and development	133,797	120,650	260,876	237,370
Adjusted sales and marketing	271,648	271,199	543,447	535,781
Adjusted general and administrative	63,143	65,814	127,023	133,011
Stock-based compensation expense	188,699	237,950	390,268	467,375
Interest income	(81,159)	(88,260)	(162,940)	(166,248)
Other segment items	(52,476)	12,963	(20,703)	26,159
Provision for income taxes	89,570	73,874	150,732	149,530
Net income	358,592	219,015	613,195	435,323
Eliminations and Reconciling Items
Segment Reporting Information [Line Items]
Net income	$ 0	$ 0	$ 0	$ 0