Revenue Recognition - Schedule of Contract Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Disaggregation of Revenue [Line Items]
Total net revenue	$ 1,853	$ 1,570	$ 5,249	$ 4,492
Design
Disaggregation of Revenue [Line Items]
Total net revenue	1,537	1,295	4,371	3,748
Make
Disaggregation of Revenue [Line Items]
Total net revenue	205	171	578	478
Other
Disaggregation of Revenue [Line Items]
Total net revenue	111	104	300	266
Indirect
Disaggregation of Revenue [Line Items]
Total net revenue	626	908	2,044	2,696
Direct
Disaggregation of Revenue [Line Items]
Total net revenue	1,227	662	3,205	1,796
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	820	705	2,331	1,986
U.S.
Disaggregation of Revenue [Line Items]
Total net revenue	666	579	1,880	1,631
Other Americas
Disaggregation of Revenue [Line Items]
Total net revenue	154	126	451	355
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	715	580	2,017	1,684
Asia Pacific
Disaggregation of Revenue [Line Items]
Total net revenue	318	285	901	822
Architecture, Engineering, Construction and Operations
Disaggregation of Revenue [Line Items]
Total net revenue	921	751	2,608	2,138
AutoCAD and AutoCAD LT
Disaggregation of Revenue [Line Items]
Total net revenue	458	398	1,309	1,163
Manufacturing
Disaggregation of Revenue [Line Items]
Total net revenue	355	307	998	871
Media and Entertainment
Disaggregation of Revenue [Line Items]
Total net revenue	86	83	242	231
Other
Disaggregation of Revenue [Line Items]
Total net revenue	$ 33	$ 31	$ 92	$ 89