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Other assets (Details Narrative) - BRL (R$)	Dec. 31, 2021	Dec. 31, 2020
TotalAssets	R$ 222,839	R$ 103,651

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Name:	afya_OtherCurrentAssets1
Namespace Prefix:	afya_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant