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Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 24, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 0-18953    
Entity Registrant Name AAON, INC.    
Entity Incorporation, State or Country Code NV    
Entity Tax Identification Number 87-0448736    
Entity Address, Address Line One 2425 South Yukon Ave.,    
Entity Address, City or Town Tulsa,    
Entity Address, State or Province OK    
Entity Address, Postal Zip Code 74107    
City Area Code 918    
Local Phone Number 583-2266    
Title of 12(b) Security Common Stock    
Trading Symbol AAON    
Security Exchange Name NASDAQ    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? 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    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 5,801.1
Entity Common Stock, Shares Outstanding   81,597,289  
Documents Incorporated by Reference
Portions of registrant’s definitive Proxy Statement to be filed in connection with the 2025 Annual Meeting of Stockholders to be held May 13, 2025, incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein.
    
Entity Central Index Key 0000824142    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false