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[Member] nCino K.K. Balance, beginning of year Balance, end of year Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Nonvoting Common Stock Nonvoting Common Stock [Member] Proceeds from initial public offering, net of underwriting discounts and commissions Proceeds from Issuance Initial Public Offering Additional paid-in capital Additional Paid in Capital 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Class of Stock [Axis] Class of Stock [Axis] Income tax expense Income Tax Expense (Benefit) Cash paid during the year for taxes, net of refunds Income Taxes Paid, Net Schedule of Nonvested Restricted Stock Units Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Cash and Cash Equivalents, beginning of period Cash and Cash Equivalents, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Diluted loss per share attributable to nCino, Inc. (in USD per share) Earnings Per Share, Diluted License and Service License and Service [Member] Cash consideration to members Cash consideration to shareholders Payments to Acquire Businesses, Gross Accounts payable, related parties Increase (Decrease) in Accounts Payable, Related Parties Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Finite-lived Intangible Assets Amortization Expense Finite-lived Intangible Assets Amortization Expense [Table Text Block] Stock issuance related to business combinations Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Net loss and adjustment attributable to redeemable non-controlling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest, Net of Adjustment Net Income (Loss) Attributable to Redeemable Noncontrolling Interest, Net of Adjustment Related Party Transaction [Domain] Related Party Transaction [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Deferred income taxes Deferred Income Tax Expense (Benefit) Award Type [Axis] Award Type [Axis] Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets [Member] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Translation adjustments Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) Maximum Maximum [Member] Security Exchange Name Security Exchange Name Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Accumulated Deficit Retained Earnings [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Less comprehensive loss attributable to redeemable non-controlling interest: Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Remaining obligation, expected fulfillment period Related Party, Remaining Obligation, Expected Fulfillment Period Related Party, Remaining Obligation, Expected Fulfillment Period Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Balance, beginning of period Balance, end of period Accounts Receivable, Allowance for Credit Loss Award Type [Domain] Award Type [Domain] Accounts receivable, related parties Increase (Decrease) in Accounts Receivable, Related Parties Document Transition Report Document Transition Report Revenue from related parties Revenue from Related Parties Exercisable, July 31, 2020 (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Basic and Diluted Loss per Share Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Redeemable non-controlling interest (Note 3) Redeemable Noncontrolling Interest, Equity, Carrying Amount Current Liabilities Liabilities, Current [Abstract] Fair Value, Measurement, Recurring Fair Value, Recurring [Member] Recently Adopted Accounting Guidance New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Basic loss per share: Earnings Per Share, Basic [Abstract] Contingent consideration - cash payment Business Combination, Consideration Transferred, Cash Paid Business Combination, Consideration Transferred, Cash Paid