The percentage of average interest on financial intrument.

No definition available.

Name:	afya_PercenatgeOfAverageInterestOnFinancialInstrument
Namespace Prefix:	afya_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

6 Cash and cash equivalents (Details Narrative)	Dec. 31, 2019	Dec. 31, 2018
Bank Certificates of Deposit [Member]
CashAndCashEquivalentLineItems [Line Items]
Percentage of average interest	99.22%
Interbank Certificates Of Deposit [Member]
CashAndCashEquivalentLineItems [Line Items]
Percentage of average interest		99.28%