Revenue Recognition - Schedule of Contract Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Disaggregation of Revenue [Line Items]
Total net revenue	$ 1,633	$ 1,417
Design
Disaggregation of Revenue [Line Items]
Total net revenue	1,361	1,196
Make
Disaggregation of Revenue [Line Items]
Total net revenue	179	145
Other
Disaggregation of Revenue [Line Items]
Total net revenue	93	76
Indirect
Disaggregation of Revenue [Line Items]
Total net revenue	742	880
Direct
Disaggregation of Revenue [Line Items]
Total net revenue	891	537
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	725	619
U.S.
Disaggregation of Revenue [Line Items]
Total net revenue	585	509
Other Americas
Disaggregation of Revenue [Line Items]
Total net revenue	140	110
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	627	534
Asia Pacific
Disaggregation of Revenue [Line Items]
Total net revenue	281	264
Architecture, Engineering, Construction and Operations
Disaggregation of Revenue [Line Items]
Total net revenue	809	674
AutoCAD and AutoCAD LT
Disaggregation of Revenue [Line Items]
Total net revenue	411	376
Manufacturing
Disaggregation of Revenue [Line Items]
Total net revenue	309	268
Media and Entertainment
Disaggregation of Revenue [Line Items]
Total net revenue	76	71
Other
Disaggregation of Revenue [Line Items]
Total net revenue	$ 28	$ 28