Segments - Schedule of Segments (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Oct. 31, 2025	Jul. 31, 2025	Apr. 30, 2025	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024	Oct. 31, 2025	Oct. 31, 2024
Revenue from External Customer [Line Items]
Total net revenue	$ 1,853			$ 1,570			$ 5,249	$ 4,492
Amortization of developed technologies	25			23			73	62
Marketing and sales	612			525			1,737	1,474
Research and development	416			378			1,223	1,092
General and administrative	172			161			502	477
Amortization of purchased intangibles	13			13			40	37
Restructuring, other exit costs, and facility reductions	5			0			116	0
Stock-based compensation	186			181			607	500
Interest and other (income) expense, net	2			(5)			(11)	(24)
Provision for income taxes	125			76			350	203
Net income	343	$ 313	$ 152	275	$ 282	$ 252	808	809
Reportable Segment
Revenue from External Customer [Line Items]
Total net revenue	1,853			1,570			5,249	4,492
Cost of subscription revenue	108			96			311	278
Cost of other revenue	18			16			56	48
Amortization of developed technologies	25			23			73	62
Marketing and sales	433			437			1,227	1,250
Research and development	332			298			966	870
General and administrative	139			129			403	396
Amortization of purchased intangibles	13			13			40	37
Restructuring, other exit costs, and facility reductions	5			0			116	0
New transaction model	124			31			303	63
Stock-based compensation	186			181			607	500
Interest and other (income) expense, net	2			(5)			(11)	(24)
Provision for income taxes	125			76			350	203
Net income	$ 343			$ 275			$ 808	$ 809