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Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Wealthfront Holdings LLC Wealthfront Holdings LLC [Member] Wealthfront Holdings LLC Accounts payable Increase (Decrease) in Other Accounts Payable Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Series B Preferred Stock Series B Preferred Stock [Member] Cash segregated and on deposit for regulatory purposes Cash and Securities Segregated under Securities Exchange Commission Regulation, Current Cash and Securities Segregated under Securities Exchange Commission Regulation, Current Equity Awards Adjustments Equity Awards Adjustments [Member] 2027 (remaining) Purchase Obligation, to be Paid, Remainder of Fiscal Year Total liabilities and stockholders’ equity Liabilities and Equity 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Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Options outstanding, Aggregate intrinsic value, beginning balance (in USD) Options outstanding, Aggregate intrinsic value, ending balance (in USD) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period General and administrative General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Sale of stock, price per share (in USD per share) Sale of Stock, Price Per Share Issuance of 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Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Percentage of voting interest acquired Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Percentage Of Voting Interests Acquired Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Percentage Of Voting Interests Acquired Name Trading Arrangement, Individual Name Unrecognized share-based compensation cost related to unvested restricted stock units Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Expected term (years) Measurement Input, Expected Term [Member] Conversion of redeemable convertible preferred stock Temporary Equity, Shares, Conversion Of Convertible Securities Temporary Equity, Shares, Conversion Of Convertible Securities Non-cash lease expense Operating Lease, Expense Company Selected Measure Amount Company Selected Measure Amount Series F Preferred Stock Series F Preferred Stock [Member] Depreciation and amortization of property, software, and equipment, net Depreciation, Depletion and Amortization Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Current assets: Assets, Current [Abstract] Percent of voting power owner Share-Based Compensation Arrangement by Share-Based Payment Award, Terms, Voting Power Owner, Percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Terms, Voting Power Owner, Percentage Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Impairment of internally developed software Intangible Asset, Finite-Lived, Impairment Loss Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Provision for income taxes Income Tax Expense (Benefit) Numerator: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Temporary Equity, by Class of Stock [Table] Temporary Equity, by Class of Stock [Table] Total Purchase Obligation Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Fractional shares repurchase obligation Fractional Shares Repurchase Obligation, Noncurrent, Fair Value Disclosure Fractional Shares Repurchase Obligation, Noncurrent, Fair Value Disclosure Net income Net 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Index Swap Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Lease-Related Assets and Liabilities Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Revenue: Revenues [Abstract] Yearly increase in shares reserved for issuance, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage Increase of Outstanding Stock Maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage Increase of Outstanding Stock Maximum Company Company [Member] Company Category of Item Purchased [Axis] Category of Item Purchased [Axis] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]