Labor and social obligations (Details 2) R$ / shares in Units, R$ in Thousands	12 Months Ended
Dec. 31, 2023 BRL (R$) R$ / shares
Modified Plan [member] \| I P C A [Member]
IfrsStatementLineItems [Line Items]
Expected volatility	0.00%
Expected life of stock options	5 years
Share price at the measurement date \| R$ / shares	R$ 75
Model used	Binomial
Weighted average fair value at the measurement date \| R$ / shares	R$ 28.10
Modified Plan [member] \| Bottom of range [member] \| I P C A [Member]
IfrsStatementLineItems [Line Items]
Strike price at the measurement date \| R$	R$ 59
Expected volatility	45.00%
Risk-free interest rate	10.00%
Modified Plan [member] \| Top of range [member] \| I P C A [Member]
IfrsStatementLineItems [Line Items]
Strike price at the measurement date \| R$	R$ 104
Expected volatility	54.00%
Risk-free interest rate	12.00%
Original Plan [member] \| C D I [Member]
IfrsStatementLineItems [Line Items]
Expected volatility	0.00%
Expected life of stock options	5 years
Share price at the measurement date \| R$ / shares	R$ 75
Model used	Binomial
Weighted average fair value at the measurement date \| R$ / shares	R$ 26.00
Original Plan [member] \| Bottom of range [member] \| C D I [Member]
IfrsStatementLineItems [Line Items]
Strike price at the measurement date \| R$	R$ 59
Expected volatility	45.00%
Risk-free interest rate	10.00%
Original Plan [member] \| Top of range [member] \| C D I [Member]
IfrsStatementLineItems [Line Items]
Strike price at the measurement date \| R$	R$ 104
Expected volatility	54.00%
Risk-free interest rate	12.00%

No definition available.

Name:	afya_ExpectedLifeOfStockOptions
Namespace Prefix:	afya_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	afya_IfrsStatementLineItems
Namespace Prefix:	afya_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	afya_SharePriceFairValueAtMeasurementDateShareOptionsGranted
Namespace Prefix:	afya_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	afya_StrikePriceeAtMeasurementDateShareOptionsGranted
Namespace Prefix:	afya_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	afya_WeightedAverageFairValueAtMeasurementDateShareOptionsGrantedOne
Namespace Prefix:	afya_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The description of the option pricing model used for share options granted. [Refer: Option pricing model [member]]

+ References

+ Details

Name:	ifrs-full_DescriptionOfOptionPricingModelShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

+ References

+ Details

Name:	ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of an expected dividend used to calculate the fair value of share options granted.

+ References

+ Details

Name:	ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=afya_ModifiedPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfAntidilutiveInstrumentsAxis=afya_IPCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=afya_OriginalPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfAntidilutiveInstrumentsAxis=afya_CDIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: