Revenue Recognition - Schedule of Contract Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Disaggregation of Revenue [Line Items]
Total net revenue	$ 1,763	$ 1,505	$ 3,396	$ 2,922
Design
Disaggregation of Revenue [Line Items]
Total net revenue	1,472	1,257	2,833	2,453
Make
Disaggregation of Revenue [Line Items]
Total net revenue	194	162	373	307
Other
Disaggregation of Revenue [Line Items]
Total net revenue	97	86	190	162
Indirect
Disaggregation of Revenue [Line Items]
Total net revenue	676	908	1,418	1,788
Direct
Disaggregation of Revenue [Line Items]
Total net revenue	1,087	597	1,978	1,134
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	786	662	1,511	1,281
U.S.
Disaggregation of Revenue [Line Items]
Total net revenue	629	543	1,214	1,052
Other Americas
Disaggregation of Revenue [Line Items]
Total net revenue	157	119	297	229
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	675	570	1,302	1,104
Asia Pacific
Disaggregation of Revenue [Line Items]
Total net revenue	302	273	583	537
Architecture, Engineering, Construction and Operations
Disaggregation of Revenue [Line Items]
Total net revenue	878	713	1,687	1,387
AutoCAD and AutoCAD LT
Disaggregation of Revenue [Line Items]
Total net revenue	440	389	851	765
Manufacturing
Disaggregation of Revenue [Line Items]
Total net revenue	334	296	643	564
Media and Entertainment
Disaggregation of Revenue [Line Items]
Total net revenue	80	77	156	148
Other
Disaggregation of Revenue [Line Items]
Total net revenue	$ 31	$ 30	$ 59	$ 58