v3.25.4

Fair Value of Financial Assets and Liabilities - Schedule of Adverse Changes in the Fair Value of Residual Interests in Structured Transactions (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount Rate increase of 20%	$ (374)	$ (181)
Discount Rate increase of 40%	(712)	(343)
Default Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Default Rate increase of 20%	(25)	(28)
Default Rate increase of 40%	(57)	(50)
Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Prepayment Rate increase of 20%	(73)	(35)
Prepayment Rate increase of 40%	$ (134)	$ (64)

X

- Definition

Sensitivity Analysis of Fair Value, Residual Interests In Structured Transactions, Impact of 20 Percent Adverse Change In Default Rate

+ References

No definition available.

+ Details

Name:	afrm_SensitivityAnalysisOfFairValueResidualInterestsInStructuredTransactionsImpactOf20PercentAdverseChangeInDefaultRate
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sensitivity Analysis of Fair Value, Residual Interests In Structured Transactions, Impact of 20 Percent Adverse Change in Discount Rate

+ References

No definition available.

+ Details

Name:	afrm_SensitivityAnalysisOfFairValueResidualInterestsInStructuredTransactionsImpactOf20PercentAdverseChangeInDiscountRate
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sensitivity Analysis of Fair Value, Residual Interests In Structured Transactions, Impact of 20 Percent Adverse Change in Prepayment Speed

+ References

No definition available.

+ Details

Name:	afrm_SensitivityAnalysisOfFairValueResidualInterestsInStructuredTransactionsImpactOf20PercentAdverseChangeInPrepaymentSpeed
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sensitivity Analysis of Fair Value, Residual Interests In Structured Transactions, Impact of 40 Percent Adverse Change In Default Rate

+ References

No definition available.

+ Details

Name:	afrm_SensitivityAnalysisOfFairValueResidualInterestsInStructuredTransactionsImpactOf40PercentAdverseChangeInDefaultRate
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sensitivity Analysis of Fair Value, Residual Interests In Structured Transactions, Impact of 40 Percent Adverse Change in Discount Rate

+ References

No definition available.

+ Details

Name:	afrm_SensitivityAnalysisOfFairValueResidualInterestsInStructuredTransactionsImpactOf40PercentAdverseChangeInDiscountRate
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sensitivity Analysis of Fair Value, Residual Interests In Structured Transactions, Impact of 40 Percent Adverse Change in Prepayment Speed

+ References

No definition available.

+ Details

Name:	afrm_SensitivityAnalysisOfFairValueResidualInterestsInStructuredTransactionsImpactOf40PercentAdverseChangeInPrepaymentSpeed
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 43
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-43

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 103
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-103

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDefaultRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: