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Withholding, Share-Based Payment Arrangement Summary of Other Assets Schedule of Other Assets [Table Text Block] Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net loss attributable to Hippo - basic Net Income (Loss) Available to Common Stockholders, Basic Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Claims receivable Insurance Settlements Receivable Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Additional Disclosures Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Geographical [Axis] Geographical [Axis] Summary of Gross Written Premium by Geographical Areas Gross Written Premium by Geographical Areas [Table Text Block] Gross Written Premium by Geographical Areas Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Gross written premium Premiums Written Gross Benchmark [Member] Premiums Written Gross Benchmark Level 1 Fair Value, Inputs, Level 1 [Member] Arizona COLORADO Net loss per share attributable to Hippo - diluted (in dollars per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security After five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax, Noncurrent Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax, Noncurrent Per share data: Earnings Per Share [Abstract] Deduct: Loss and LAE payments, net of reinsurance, related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Investments, Debt and Equity Securities [Abstract] Summary of Computation of Diluted Net Loss Per Share Attributable to Common Stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Prepaid expenses Prepaid Expense Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months [Abstract] Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Accrued Expenses and Other Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] RSU and PRSU Restricted Stock Units (RSUs) and Performance Shares [Member] Restricted Stock Units (RSUs) and Performance Shares Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Claim payments outstanding Claim Payments Outstanding Claim Payments Outstanding Vesting Basis [Domain] Vesting Basis [Domain] Vesting Basis [Domain] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Award Timing Disclosures [Line Items] Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Reserve for losses and LAE, net of reinsurance recoverables as of beginning of the period Reserve for losses and LAE, net of reinsurance recoverables at end of period Liability for Unpaid Claims and Claims Adjustment Expense, Net Stockholders’ Equity Equity [Text Block] Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Illinois ILLINOIS Reinsurance Reinsurance [Text Block] Net income (loss) attributable to Hippo Net Income (Loss) Attributable to Parent Summary of Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Ohio GEORGIA Stockholders’ equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer [Abstract] Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Property and equipment Property, Plant and Equipment, Net Change in net unrealized (loss) gain on investments, net of tax Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Technology and development expenses Technology and Development Expense Technology and Development Expense Geographic Concentration Risk Geographic Concentration Risk [Member] Ceded Ceded Premiums Written Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Customer relationships Customer Relationships [Member] New York FLORIDA One year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Accumulated deficit Retained Earnings (Accumulated Deficit) Financial Instrument [Axis] Financial Instrument [Axis] Expenses: Benefits, Losses and Expenses [Abstract] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Gross Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Interest and other (income) expense, net Other Operating Income (Expense), Net Ceding commissions receivable Ceding Commissions Receivable Ceding Commissions Receivable Catastrophe reserves release Liability for Unpaid Claims and Claims Adjustment Expense, Catastrophe Reserves Release Liability for Unpaid Claims and Claims Adjustment Expense, Catastrophe Reserves Release Current Fiscal Year End Date Current Fiscal Year End Date Gross Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax, Current Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax, Current Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Payables and Accruals [Abstract] Weighted Average Grant-Date Fair Value per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Prior year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Statement [Table] Statement [Table] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Description of Business and Summary of Significant Accounting Policies Business Description and Accounting Policies [Text Block] Unrecognized tax benefits Unrecognized Tax Benefits Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Georgia MASSACHUSETTS All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Loss and loss adjustment expense reserve Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE as of beginning of the period Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE as of end of the period Liability for Claims and Claims Adjustment Expense Deferred consideration Deferred Consideration, Sale Of Business Deferred Consideration, Sale Of Business Termination Date Trading Arrangement Termination Date Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] State licenses and domain name State Licenses and Domain Name [Member] State Licenses and Domain Name Summary of Share-based Payment Arrangement, Option, Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Summary of Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Weighted-average shares used in computing net loss per share attributable to Hippo - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Remaining authorized amount of common stock available for repurchase Share Repurchase Program, Remaining Authorized, Amount Disposal Group Classification [Domain] Disposal Group Classification [Domain] Summary of Net Loss Per Share Attributable to Common Stockholders Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Summary of Unvested Restricted Stock Units Roll Forward Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Investment expenses Investment Income, Investment Expense Entity Tax Identification Number Entity Tax Identification Number Securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Insurance related expenses Insurance Related Expenses [Member] Insurance Related Expenses Outstanding, beginning balance (in dollar per share) Outstanding, ending balance (in dollar per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued Commercial mortgage-backed securities Commercial Mortgage-Backed Securities [Member] Common stock from outstanding warrants Warrant, Common Shares [Member] Warrant, Common Shares Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Use of Estimates Use of Estimates, Policy [Policy Text Block] Fiduciary assets Fiduciary Assets [Member] Fiduciary Assets Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Insider Trading Arrangements [Line Items] Gross Liability for Claims and Claims Adjustment Expense Incurred, Gross Liability for Claims and Claims Adjustment Expense Incurred, Gross Security Exchange Name Security Exchange Name Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost [Abstract] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Gross Written Premium [Line Items] Gross Written Premium [Line Items] Gross Written Premium Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Capitalized internal use software Capitalized Computer Software, Net Short-term investments, at fair value (amortized cost: $125.3 million and $152.5 million, respectively) Fair Value Short-term investments Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current Ceded Ceded Premiums Earned Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] New Jersey LOUISIANA Issuance of common stock from stock plans and contingently issuable shares Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Asset backed securities Asset-Backed Securities [Member] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Released (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Total investments Debt Securities, Available-for-Sale Interest paid Debt Instrument, Interest Paid Debt Instrument, Interest Paid Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate securities Corporate Debt Securities [Member] Purchase obligation, term (in years) Purchase Obligation, Term Purchase Obligation, Term Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation