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Subsequent Events - Narrative (Details) - Subsequent Event - USD ($)
Oct. 01, 2021
Oct. 15, 2021
Line of Credit | Revolving Credit Facility    
Subsequent Event [Line Items]    
Line of credit facility, maximum borrowing capacity   $ 350,000,000
Root, Inc.    
Subsequent Event [Line Items]    
Purchase of convertible preferred stock and warrants $ 126,000,000