XML 74 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Document - USD ($)
12 Months Ended
Dec. 31, 2020
Feb. 17, 2021
Jun. 30, 2020
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 0-20853    
Entity Registrant Name ANSYS, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 04-3219960    
Entity Address, Address Line One 2600 ANSYS Drive,    
Entity Address, City or Town Canonsburg,    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 15317    
City Area Code 844    
Local Phone Number 462-6797    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 20,712,000,000
Entity Common Stock, Shares Outstanding   86,751,764  
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001013462    
Current Fiscal Year End Date --12-31    
Nasdaq Stock Market LLC      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol ANSS    
Security Exchange Name NASDAQ