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Cover
 12 Months Ended
Dec. 31, 2020
shares
Disclosure of classes of share capital [line items]  
Entity Registrant Name Afya Ltd
Entity Central Index Key 0001771007
Document Type 20-F
Document Period End Date Dec. 31, 2020
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Shell Company false
Document Transition Report false
Document Shell Company Report false
Document Annual Report true
Entity Interactive Data Current Yes
Auditor Attestation Flag true
Entity Incorporation, State or Country Code E9
Document Accounting Standard International Financial Reporting Standards
Document Fiscal Period Focus FY
Document Fiscal Year Focus 2020
Class A Ordinary Shares [Member]  
Disclosure of classes of share capital [line items]  
Entity Common Stock, Shares Outstanding 45,112,416
Class B Ordinary Shares [Member]  
Disclosure of classes of share capital [line items]  
Entity Common Stock, Shares Outstanding 48,034,315