Revenue Recognition - Contract Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Total net revenue	$ 4,386.4	$ 3,790.4	$ 3,274.3
Design
Disaggregation of Revenue [Line Items]
Total net revenue	3,868.8	3,365.8	2,920.1
Make
Disaggregation of Revenue [Line Items]
Total net revenue	363.9	296.4	218.4
Other
Disaggregation of Revenue [Line Items]
Total net revenue	153.7	128.2	135.8
Indirect
Disaggregation of Revenue [Line Items]
Total net revenue	2,849.4	2,600.0	2,282.2
Direct
Disaggregation of Revenue [Line Items]
Total net revenue	1,537.0	1,190.4	992.1
Americas
Disaggregation of Revenue [Line Items]
Total net revenue	1,765.1	1,542.4	1,335.8
U.S.
Disaggregation of Revenue [Line Items]
Total net revenue	1,456.5	1,281.8	1,108.9
Other Americas
Disaggregation of Revenue [Line Items]
Total net revenue	308.6	260.6	226.9
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total net revenue	1,700.4	1,472.6	1,303.5
Asia Pacific
Disaggregation of Revenue [Line Items]
Total net revenue	920.9	775.4	635.0
Architecture, Engineering and Construction
Disaggregation of Revenue [Line Items]
Total net revenue	1,959.9	1,648.6	1,377.1
Manufacturing
Disaggregation of Revenue [Line Items]
Total net revenue	876.0	798.6	726.1
AutoCAD and AutoCAD LT
Disaggregation of Revenue [Line Items]
Total net revenue	1,253.0	1,099.4	948.2
Media and Entertainment
Disaggregation of Revenue [Line Items]
Total net revenue	258.9	219.4	199.2
Other
Disaggregation of Revenue [Line Items]
Total net revenue	$ 38.6	$ 24.4	$ 23.7