Segment Information - Schedule of Significant Segment Expenses and Other Segment Items (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Segment Reporting [Line Items]
Revenue	$ 1,277,217	$ 1,217,227	$ 2,516,223	$ 2,391,942
Stock-based compensation expense	179,784	188,699	358,737	390,268
Provision for income taxes	452,522	89,570	558,465	150,732
Net income	1,542,445	358,592	1,968,122	613,195
Operating Segments | Reportable Segment
Segment Reporting [Line Items]
Revenue	1,277,217	1,217,227	2,516,223	2,391,942
Adjusted cost of revenue	267,272	245,413	516,070	490,044
Adjusted research and development	165,706	133,797	318,818	260,876
Adjusted sales and marketing	267,081	271,648	532,321	543,447
Adjusted general and administrative	66,881	63,143	130,018	127,023
Stock-based compensation expense	179,784	188,699	358,737	390,268
Interest income	(68,635)	(81,159)	(138,918)	(162,940)
Other segment items	(1,595,839)	(52,476)	(1,727,410)	(20,703)
Provision for income taxes	452,522	89,570	558,465	150,732
Net income	1,542,445	358,592	1,968,122	613,195
Eliminations and Reconciling Items
Segment Reporting [Line Items]
Net income	$ 0	$ 0	$ 0	$ 0