v3.26.1
Borrowings - Credit Agreement (Details)
1 Months Ended 6 Months Ended
Feb. 19, 2026
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Feb. 19, 2025
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Jun. 21, 2024
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Dec. 12, 2023
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Jan. 13, 2023
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Jan. 31, 2022
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swap
Dec. 31, 2023
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swap
Jun. 30, 2026
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Dec. 31, 2025
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Nov. 30, 2025
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Sep. 23, 2025
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Jan. 31, 2025
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Sep. 30, 2024
USD ($)
Jan. 13, 2022
USD ($)
Debt Instrument [Line Items]                            
Commitment fee (as a percent)               0.50%            
Receivables from broker-dealers and clearing organizations               $ 3,207,464,000 $ 1,896,405,000          
Total principal of long-term borrowings               $ 2,051,082,000 2,067,334,000          
Interest rate swap                            
Debt Instrument [Line Items]                            
Derivative contract term           5 years 2 years              
Derivative, notional amount           $ 525,000,000.0 $ 1,525,000,000              
Fixed interest rate percentage (as a percent)                         4.50%  
January 2022 Interest Rate Swap                            
Debt Instrument [Line Items]                            
Derivative contract term           5 years                
Derivative, notional amount           $ 1,000,000,000                
Number of interest rate swaps | swap           2                
Fixed interest rate percentage (as a percent)                       4.60%    
December 2023 Interest Rate Swap                            
Debt Instrument [Line Items]                            
Derivative contract term             2 years              
Derivative, notional amount             $ 1,525,000,000              
Number of interest rate swaps | swap             2              
Fixed interest rate percentage (as a percent)             7.50%              
Receivables from broker-dealers and clearing organizations             $ 55,800,000              
June 2024 Interest Rate Swap                            
Debt Instrument [Line Items]                            
Derivative, notional amount             1,525,000,000     $ 1,075,000,000        
Receivables from broker-dealers and clearing organizations             2,000,000.0              
Reclassification from AOCI to other income     $ 5,700,000                      
First Lien Term Loan                            
Debt Instrument [Line Items]                            
Debt amortization, percentage of original aggregate principal amount               1.00%            
Repayments of term loan       $ 55,000,000.0 $ 18,000,000.0                  
Committed facility                            
Debt Instrument [Line Items]                            
Total principal of long-term borrowings               $ 200,000,000 $ 0          
Committed facility | Scenario 1                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               1.00%            
Committed facility | Scenario 2                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               1.50%            
Committed facility | SOFR                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               2.50%            
Committed facility | SOFR | Scenario 2                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               0.00%            
Committed facility | VFH                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity                           $ 250,000,000.0
Letter of credit | VFH                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity                           20,000,000.0
Swingline subfacility | VFH                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity                           20,000,000.0
Amended Credit Agreement | Overnight Bank Funding Rate                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               0.50%            
Amended Credit Agreement | SOFR                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               1.00%            
Senior Secured Second Lien Notes | Scenario 1                            
Debt Instrument [Line Items]                            
Commitment fee stepdown (as a percent)               0.375%            
Senior Secured Second Lien Notes | Scenario 2                            
Debt Instrument [Line Items]                            
Commitment fee stepdown (as a percent)               0.25%            
First Lien Term Loan Facility                            
Debt Instrument [Line Items]                            
Short-term debt               $ 0            
First Lien Term Loan                            
Debt Instrument [Line Items]                            
Face amount                           $ 1,800,000,000
First Lien Term Loan | First Lien Notes Due 2031                            
Debt Instrument [Line Items]                            
Face amount     500,000,000.0                      
Term Loan | Interest rate swap                            
Debt Instrument [Line Items]                            
Total principal of long-term borrowings               $ 1,529,600,000            
Term Loan | June 2024 Interest Rate Swap                            
Debt Instrument [Line Items]                            
Fixed interest rate percentage (as a percent)                   7.17%        
Term Loan | Scenario 1                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               1.50%            
Term Loan | Scenario 2                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               2.00%            
Term Loan | SOFR                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               3.00%            
Term Loan | SOFR | Scenario 1                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)               0.50%            
Term Loan | VFH | Interest rate swap                            
Debt Instrument [Line Items]                            
Face amount             $ 1,525,000,000     $ 1,075,000,000   $ 1,000,000,000 $ 525,000,000.0  
Fixed interest rate percentage (as a percent)                   6.92%        
Line of credit | First Lien Notes Due 2031                            
Debt Instrument [Line Items]                            
Face amount     $ 1,245,000,000                      
Debt instrument, term     3 years                      
Line of credit | First Lien Notes Due 2031 | Minimum                            
Debt Instrument [Line Items]                            
Total principal of long-term borrowings     $ 250,000,000.0                      
Line of credit | First Lien Notes Due 2031 | Maximum                            
Debt Instrument [Line Items]                            
Total principal of long-term borrowings     $ 300,000,000.0                      
Line of credit | New Term Loans                            
Debt Instrument [Line Items]                            
Face amount   $ 1,245,000,000                 $ 1,545,000,000      
Total principal of long-term borrowings                     $ 300,000,000.0      
Line of credit | Component one | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)   1.50%                        
Line of credit | Component two | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)   2.50%                        
Line of credit | First Lien Term Loan | Component one | First Lien Notes Due 2031                            
Debt Instrument [Line Items]                            
Debt instrument, additional basis spread on variable rate (as a percent)     1.75%                      
Line of credit | First Lien Term Loan | Component one | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)     1.00%                      
Line of credit | Line of credit | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)   0.50% 0.50%                      
Percentage of periodic payment (as a percent)   1.00% 1.00%                      
Line of credit | Senior Secured Credit Facility | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)   1.00% 1.00%                      
Line of credit | Senior Secured Credit Facility | Component one | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)   1.00%                        
Line of credit | Secured debt | Component two | New Term Loans                            
Debt Instrument [Line Items]                            
Interest rate margin (as a percent)   0.00% 0.00%                      
Line of credit | Secured debt | SOFR | Component two | First Lien Notes Due 2031                            
Debt Instrument [Line Items]                            
Debt instrument, additional basis spread on variable rate (as a percent)     2.75%                      
Secured debt | New Term Loans                            
Debt Instrument [Line Items]                            
Company repaid $ 15,500,000