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Reinsurance - Narrative (Details)
12 Months Ended
Dec. 31, 2023
USD ($)
reinsurer
Dec. 31, 2022
USD ($)
Dec. 31, 2021
reinsurer
Effects of Reinsurance [Line Items]      
Loss on uncollectible accounts in period $ 0 $ 0  
Provision for sliding scale commission 23,800,000 3,500,000  
Receivable for sliding scale commission 5,800,000 4,500,000  
Provision for loss participation feature $ 112,800,000 $ 51,300,000  
Maximum | Florida Hurricane Catastrophe Fund | Florida      
Effects of Reinsurance [Line Items]      
Reinsurance, reimbursement protection, percentage 90.00%    
Reinsurance Policy, Type [Axis]: Non-Proportional Reinsurance — Hippo Home Insurance Program      
Effects of Reinsurance [Line Items]      
Excess retention, year return period, ratio 0.004    
Reinsurance Policy, Type [Axis]: Non-Proportional Reinsurance — Hippo Home Insurance Program | Maximum      
Effects of Reinsurance [Line Items]      
Excess retention, percentage 0.40%    
Reinsurance Policy, Type [Axis]: Other Reinsurance - Corporate Catastrophe Excess of Loss Catastrophe Coverage      
Effects of Reinsurance [Line Items]      
Excess retention, year return period, ratio 0.004    
Reinsurance Policy, Type [Axis]: Other Reinsurance - Corporate Catastrophe Excess of Loss Catastrophe Coverage | Maximum      
Effects of Reinsurance [Line Items]      
Excess retention, percentage 0.40%    
Reinsurance Policy, Type [Axis]: Other Reinsurance - Proportional and Excess of Loss Catastrophe Coverage | Maximum      
Effects of Reinsurance [Line Items]      
Ceded risk, percentage 100.00%    
Reinsurance Policy, Type [Axis]: Other Reinsurance - Proportional and Excess of Loss Catastrophe Coverage | Minimum      
Effects of Reinsurance [Line Items]      
Ceded risk, percentage 75.00%    
Reinsurance Policy, Type [Axis]: Proportional Reinsurance Treaties — Hippo Home Insurance Program      
Effects of Reinsurance [Line Items]      
Reinsured risk, percentage 40.00% 10.00% 12.00%
Number of reinsurers | reinsurer     2
Percentage attributable to program     33.00%
Agreement term (in years)     3 years
Reinsurance Policy, Type [Axis]: Proportional Reinsurance Treaties — Hippo Home Insurance Program, Business Channel      
Effects of Reinsurance [Line Items]      
Reinsured risk, percentage 58.00%    
Reinsurance, number of third-party reinsurers | reinsurer 3