Revenue Recognition - Schedule of Contract Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Disaggregation of Revenue [Line Items]
Total net revenue	$ 2,046	$ 1,763	$ 3,980	$ 3,396
Design
Disaggregation of Revenue [Line Items]
Total net revenue	1,708	1,472	3,320	2,833
Make
Disaggregation of Revenue [Line Items]
Total net revenue	244	194	468	373
Other
Disaggregation of Revenue [Line Items]
Total net revenue	94	97	192	190
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	898	786	1,742	1,511
U.S.
Disaggregation of Revenue [Line Items]
Total net revenue	727	629	1,409	1,214
Other Americas
Disaggregation of Revenue [Line Items]
Total net revenue	171	157	333	297
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	804	675	1,565	1,302
Asia Pacific
Disaggregation of Revenue [Line Items]
Total net revenue	344	302	673	583
Architecture, Engineering, Construction and Operations
Disaggregation of Revenue [Line Items]
Total net revenue	1,029	878	1,999	1,687
AutoCAD and AutoCAD LT
Disaggregation of Revenue [Line Items]
Total net revenue	500	440	974	851
Manufacturing
Disaggregation of Revenue [Line Items]
Total net revenue	385	334	752	643
Media and Entertainment
Disaggregation of Revenue [Line Items]
Total net revenue	92	80	178	156
Other
Disaggregation of Revenue [Line Items]
Total net revenue	$ 40	$ 31	$ 77	$ 59