v3.25.4

Investments - Schedule of Contractual Maturities of Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	$ 498,340	$ 673,109
Within 1 year, fair value	499,150	673,543
Greater than 1 year, less than or equal to 5 years, amortized cost	223,396	219,059
Greater than 1 year, less than or equal to 5 years, fair value	224,225	218,934
Amortized Cost	721,736	892,168
Fair Value	723,375	892,477
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	36,500	38,990
Within 1 year, fair value	36,552	39,008
Greater than 1 year, less than or equal to 5 years, amortized cost	0	0
Greater than 1 year, less than or equal to 5 years, fair value	0	0
Amortized Cost	36,500	38,990
Fair Value	36,552	39,008
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	153,866	149,435
Within 1 year, fair value	154,144	149,675
Greater than 1 year, less than or equal to 5 years, amortized cost	87,490	114,060
Greater than 1 year, less than or equal to 5 years, fair value	88,033	114,524
Amortized Cost	241,356	263,495
Fair Value	242,177	264,199
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	63,869
Within 1 year, fair value	63,943
Greater than 1 year, less than or equal to 5 years, amortized cost	0
Greater than 1 year, less than or equal to 5 years, fair value	0
Amortized Cost	63,869
Fair Value	63,943	126,761
Within 1 year, including cash, amortized cost		139,336
Within 1 year, including cash, fair value		139,325
Greater than 1 year, less than or equal to 5 years, including cash, amortized cost		0
Greater than 1 year, less than or equal to 5 years, including cash, fair value		0
Including cash, amortized cost		139,336
Including cash, fair value		139,325
Agency bonds
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	5,049
Within 1 year, fair value	5,051
Greater than 1 year, less than or equal to 5 years, amortized cost	0
Greater than 1 year, less than or equal to 5 years, fair value	0
Amortized Cost	5,049
Fair Value	5,051	7,854
Within 1 year, including cash, amortized cost		11,358
Within 1 year, including cash, fair value		11,347
Greater than 1 year, less than or equal to 5 years, including cash, amortized cost		0
Greater than 1 year, less than or equal to 5 years, including cash, fair value		0
Including cash, amortized cost		11,358
Including cash, fair value		11,347
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	4,511	3,944
Within 1 year, fair value	4,519	3,950
Greater than 1 year, less than or equal to 5 years, amortized cost	3,899	2,113
Greater than 1 year, less than or equal to 5 years, fair value	3,916	2,126
Amortized Cost	8,410	6,057
Fair Value	8,435	6,076
Non-US
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	0	3,162
Within 1 year, fair value	0	3,162
Greater than 1 year, less than or equal to 5 years, amortized cost	2,168	2,169
Greater than 1 year, less than or equal to 5 years, fair value	2,181	2,178
Amortized Cost	2,168	5,331
Fair Value	2,181	5,340
US
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	234,545
Within 1 year, fair value	234,941
Greater than 1 year, less than or equal to 5 years, amortized cost	39,171
Greater than 1 year, less than or equal to 5 years, fair value	39,333
Amortized Cost	273,716
Fair Value	274,274	344,434
Within 1 year, including cash, amortized cost		326,884
Within 1 year, including cash, fair value		327,076
Greater than 1 year, less than or equal to 5 years, including cash, amortized cost		22,265
Greater than 1 year, less than or equal to 5 years, including cash, fair value		22,353
Including cash, amortized cost		349,149
Including cash, fair value		349,429
Securitization notes receivable and certificates
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	0	0
Within 1 year, fair value	0	0
Greater than 1 year, less than or equal to 5 years, amortized cost	80,792	76,279
Greater than 1 year, less than or equal to 5 years, fair value	80,080	75,469
Amortized Cost	80,792	76,279
Fair Value	80,080	75,469
Residual interests in structured transactions
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	0	0
Within 1 year, fair value	0	0
Greater than 1 year, less than or equal to 5 years, amortized cost	4,876	2,173
Greater than 1 year, less than or equal to 5 years, fair value	5,436	2,284
Amortized Cost	4,876	2,173
Fair Value	5,436	2,284
Other
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	0
Within 1 year, fair value	0
Greater than 1 year, less than or equal to 5 years, amortized cost	5,000
Greater than 1 year, less than or equal to 5 years, fair value	5,246
Amortized Cost	5,000
Fair Value	$ 5,246
Commercial Paper, Agency Bonds & US Government Bonds | Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value		$ 21,100

X

- Definition

Debt Securities, Available-for-Sale, Including Cash, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss

+ References

No definition available.

+ Details

Name:	afrm_DebtSecuritiesAvailableForSaleIncludingCashAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt Securities, Available-for-Sale, Including Cash, Excluding Accrued Interest

+ References

No definition available.

+ Details

Name:	afrm_DebtSecuritiesAvailableForSaleIncludingCashExcludingAccruedInterest
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt Securities, Available-for-Sale, Including Cash, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost

+ References

No definition available.

+ Details

Name:	afrm_DebtSecuritiesAvailableForSaleIncludingCashMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsAmortizedCost
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt Securities, Available-for-Sale, Including Cash, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value

+ References

No definition available.

+ Details

Name:	afrm_DebtSecuritiesAvailableForSaleIncludingCashMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughFiveYearsFairValue
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt Securities, Available-for-Sale, Including Cash, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost

+ References

No definition available.

+ Details

Name:	afrm_DebtSecuritiesAvailableForSaleIncludingCashMaturityAllocatedAndSingleMaturityDateRollingWithinOneYearAmortizedCost
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Debt Securities, Available-for-Sale, Including Cash, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value

+ References

No definition available.

+ Details

Name:	afrm_DebtSecuritiesAvailableForSaleIncludingCashMaturityAllocatedAndSingleMaturityDateRollingWithinOneYearFairValue
Namespace Prefix:	afrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

+ Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AgencySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=afrm_NonUSGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=afrm_SecuritizationNotesReceivableAndCertificatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=afrm_ResidualInterestsInStructuredTransactionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=afrm_AgencyBondsCommercialPaperAndUSGovernmentBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_CashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: