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Fair Value Measurements - Schedule of Valuation Inputs and Assumptions (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Aggregate amount committed	$ 6,459
Conditional prepayment rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.124	0.122
Residual interests classified as debt	0.127	0.123
Conditional prepayment rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.299	0.283
Residual interests classified as debt	0.128	0.126
Conditional prepayment rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.155	0.148
Residual interests classified as debt	0.128	0.124
Annual default rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.005	0.005
Residual interests classified as debt	0.008	0.007
Annual default rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.069	0.069
Residual interests classified as debt	0.008	0.007
Annual default rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.015	0.014
Residual interests classified as debt	0.008	0.007
Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.058	0.058
Residual interests classified as debt	0.100	0.100
Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.135	0.155
Residual interests classified as debt	0.103	0.103
Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Residual investments	0.088	0.087
Residual interests classified as debt	0.100	0.100
Loan funding probability | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest rate lock commitments	0.489	0.719
Student loan commitments	0.950	0.950
Loan funding probability | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest rate lock commitments	0.858	0.772
Student loan commitments	0.950	0.950
Loan funding probability | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest rate lock commitments	0.792	0.763
Student loan commitments	0.950	0.950
Personal loans | Conditional prepayment rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.184	0.175
Servicing rights	0.086	0.179
Personal loans | Conditional prepayment rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.295	0.295
Servicing rights	0.381	0.355
Personal loans | Conditional prepayment rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.247	0.232
Servicing rights	0.225	0.224
Personal loans | Annual default rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.047	0.045
Servicing rights	0.033	0.033
Personal loans | Annual default rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.487	0.504
Servicing rights	0.160	0.225
Personal loans | Annual default rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.048	0.048
Servicing rights	0.040	0.047
Personal loans | Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.057	0.055
Servicing rights	0.088	0.088
Personal loans | Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.081	0.081
Servicing rights	0.200	0.088
Personal loans | Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.058	0.055
Servicing rights	0.091	0.088
Personal loans | Market servicing costs | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.002	0.001
Personal loans | Market servicing costs | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.010	0.018
Personal loans | Market servicing costs | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.002	0.002
Student loans | Conditional prepayment rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.077	0.084
Servicing rights	0.081	0.109
Student loans | Conditional prepayment rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.126	0.126
Servicing rights	0.151	0.153
Student loans | Conditional prepayment rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.105	0.105
Servicing rights	0.121	0.122
Student loans | Annual default rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.006	0.004
Servicing rights	0.003	0.003
Student loans | Annual default rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.061	0.064
Servicing rights	0.036	0.037
Student loans | Annual default rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.006	0.006
Servicing rights	0.007	0.006
Student loans | Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.043	0.041
Servicing rights	0.088	0.088
Student loans | Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.088	0.081
Servicing rights	0.088	0.088
Student loans | Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans	0.043	0.043
Servicing rights	0.088	0.088
Student loans | Market servicing costs | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.001	0.001
Student loans | Market servicing costs | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.002	0.002
Student loans | Market servicing costs | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.001	0.001
Home loans | Conditional prepayment rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.055	0.056
Home loans | Conditional prepayment rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.238	0.240
Home loans | Conditional prepayment rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.086	0.081
Home loans | Annual default rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.001	0.001
Home loans | Annual default rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.001	0.001
Home loans | Annual default rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.001	0.001
Home loans | Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.092	0.092
Home loans | Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.100	0.100
Home loans | Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.093	0.093
Home loans | Market servicing costs | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.001	0.001
Home loans | Market servicing costs | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.002	0.002
Home loans | Market servicing costs | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights	0.002	0.002

X

- Definition

Debt Instrument, Residual Interests, Measurement Input

+ References

No definition available.

+ Details

Name:	sofi_DebtInstrumentResidualInterestsMeasurementInput
Namespace Prefix:	sofi_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Interest Rate Lock Commitments, Measurement Input

+ References

No definition available.

+ Details

Name:	sofi_InterestRateLockCommitmentsMeasurementInput
Namespace Prefix:	sofi_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Loan Origination Commitments

+ References

No definition available.

+ Details

Name:	sofi_LoanOriginationCommitments
Namespace Prefix:	sofi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Loans Receivable, Measurement Input

+ References

No definition available.

+ Details

Name:	sofi_LoansReceivableMeasurementInput
Namespace Prefix:	sofi_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Residual Investments, Measurement Input

+ References

No definition available.

+ Details

Name:	sofi_ResidualInvestmentsMeasurementInput
Namespace Prefix:	sofi_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Student Loan Commitments, Measurement Input

+ References

No definition available.

+ Details

Name:	sofi_StudentLoanCommitmentsMeasurementInput
Namespace Prefix:	sofi_
Data Type:	xbrli:decimalItemType
Balance Type:	na
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

No definition available.

+ Details

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

X

- Definition

Value of input used to measure servicing asset.

+ References

Reference 1: 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_ServicingAssetMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
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_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=sofi_PersonalLoanPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=sofi_StudentLoanPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=sofi_HomeLoanPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: