Segment Information - Schedule of Significant Segment Expenses and Other Segment Items (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Segment Reporting Information [Line Items]
Revenue	$ 4,868,769	$ 4,665,433	$ 4,527,224
Stock-based compensation expense	760,776	931,309	1,057,161
Provision for income taxes	522,137	305,346	194,850
Net income	1,900,148	1,010,238	637,462
Operating Segments | Reportable Segment
Segment Reporting Information [Line Items]
Revenue	4,868,769	4,665,433	4,527,224
Adjusted cost of revenue	987,252	984,916	908,283
Adjusted research and development	545,301	500,177	430,117
Adjusted sales and marketing	1,113,432	1,090,294	1,116,356
Adjusted general and administrative	255,594	252,152	297,580
Stock-based compensation expense	760,776	931,309	1,057,161
Interest income	(317,246)	(340,474)	(210,009)
Other segment items	(898,625)	(68,525)	95,424
Provision for income taxes	522,137	305,346	194,850
Net income	1,900,148	1,010,238	637,462
Eliminations and Reconciling Items
Segment Reporting Information [Line Items]
Net income	$ 0	$ 0	$ 0