v3.25.2
Fair Value of Financial Instruments - Narrative (Details)
shares in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2024
USD ($)
May 03, 2024
shares
Nov. 14, 2023
shares
Sep. 01, 2022
shares
Oct. 31, 2021
USD ($)
tranche
Root Warrants                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Equity securities, not readily determinable fair value                   $ 126,000,000
Number of tranches | tranche                   8
Number of securities called by warrants (in shares) | shares             1.6 3.2 2.4  
Root Warrants | Root Warrants                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Deferred revenue $ 46,000,000   $ 46,000,000     $ 57,000,000        
Deferred revenue recognized $ 6,000,000 $ 5,000,000 $ 11,000,000 $ 10,000,000            
Measurement Input, Price Volatility | Root Warrants                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Warrants and rights outstanding, measurement input 1 1 1 1            
Fair Value, Measurements, Recurring                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Purchase price adjustment receivable gain (loss) (less than) $ (1,000,000) $ (1,000,000) $ (1,000,000) $ 1,000,000            
Level 3 | Root Warrants | Root Warrants                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Equity securities, fair value                   $ 30,000,000
Asset issuances         $ 75,000,000          
Total increase (decrease) in fair value (35,000,000) (22,000,000) 123,000,000 53,000,000            
Variable Interest Entity, Not Primary Beneficiary | Level 3 | Fair Value, Measurements, Recurring                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Proceeds from sale of beneficial interests $ 0 $ 0 $ 0 $ 9,000,000            
Variable Interest Entity, Not Primary Beneficiary | Level 3 | Fair Value, Measurements, Recurring | Measurement Input, Weighted Average Discount Rate | Valuation Technique, Discounted Cash Flow                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Measurement input, discount rate 0.093   0.093     0.097        
Minimum | Variable Interest Entity, Not Primary Beneficiary | Level 3 | Fair Value, Measurements, Recurring | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Measurement input, discount rate 0.056   0.056     0.06        
Maximum | Variable Interest Entity, Not Primary Beneficiary | Level 3 | Fair Value, Measurements, Recurring | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow                    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Measurement input, discount rate 0.10   0.10     0.10