Segment Information - Schedule of Significant Segment Expenses and Other Segment Items (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Segment Reporting Information [Line Items]
Revenue	$ 1,229,835	$ 1,177,541	$ 3,621,777	$ 3,481,295
Stock-based compensation expense	185,282	240,995	575,550	708,370
Provision for income taxes	181,836	73,362	332,568	222,892
Net income	612,873	207,050	1,226,068	642,373
Operating Segments | Reportable Segment
Segment Reporting Information [Line Items]
Revenue	1,229,835	1,177,541	3,621,777	3,481,295
Adjusted cost of revenue	245,463	248,817	735,507	734,270
Adjusted research and development	136,990	129,774	397,866	367,144
Adjusted sales and marketing	278,076	277,706	821,523	813,487
Adjusted general and administrative	62,356	63,450	189,379	196,461
Stock-based compensation expense	185,282	240,995	575,550	708,370
Interest income	(78,863)	(89,160)	(241,803)	(255,407)
Other segment items	(394,178)	25,547	(414,881)	51,705
Provision for income taxes	181,836	73,362	332,568	222,892
Net income	612,873	207,050	1,226,068	642,373
Eliminations and Reconciling Items
Segment Reporting Information [Line Items]
Net income	$ 0	$ 0	$ 0	$ 0