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Debt - Additional Information (Details)
12 Months Ended
Dec. 31, 2023
USD ($)
d
$ / shares
Dec. 31, 2022
USD ($)
Feb. 15, 2024
USD ($)
Debt Instrument [Line Items]      
Debt $ 2,537,500,000 $ 2,535,300,000  
Senior bank debt      
Debt Instrument [Line Items]      
Debt 349,900,000 349,900,000  
Senior bank debt | Revolver      
Debt Instrument [Line Items]      
Available borrowing 1,250,000,000    
Additional borrowing amount 500,000,000    
Outstanding borrowings 0 0  
Commitment fee amount 1,300,000 1,300,000  
Senior bank debt | Term Loan      
Debt Instrument [Line Items]      
Available borrowing 350,000,000    
Additional borrowing amount 75,000,000    
Debt $ 350,000,000 $ 350,000,000  
Weighted average interest rate on amount outstanding 6.31% 5.27%  
Senior bank debt | Term Loan | SOFR Adjustment      
Debt Instrument [Line Items]      
Basis spread over variable debt rate 0.10%    
Senior bank debt | Term Loan | SOFR      
Debt Instrument [Line Items]      
Basis spread over variable debt rate 0.85%    
Senior notes      
Debt Instrument [Line Items]      
Debt $ 1,096,900,000 $ 1,095,200,000  
Senior notes | 2024 Senior Notes      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Par value $ 400,000,000.0    
Stated interest rate 4.25%    
Senior notes | 2024 Senior Notes | Subsequent Event      
Debt Instrument [Line Items]      
Par value     $ 400,000,000
Stated interest rate     4.25%
Senior notes | 2024 Senior Notes | Treasury Rate      
Debt Instrument [Line Items]      
Applicable basis spread over redemption price percentage 0.25%    
Senior notes | 2025 Senior Notes      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Par value $ 350,000,000.0    
Stated interest rate 3.50%    
Senior notes | 2025 Senior Notes | Treasury Rate      
Debt Instrument [Line Items]      
Applicable basis spread over redemption price percentage 0.25%    
Senior notes | 2030 Senior Notes      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Par value $ 350,000,000.0    
Stated interest rate 3.30%    
Senior notes | 2030 Senior Notes | Treasury Rate      
Debt Instrument [Line Items]      
Applicable basis spread over redemption price percentage 0.40%    
Junior subordinated notes      
Debt Instrument [Line Items]      
Debt $ 751,800,000 751,600,000  
Junior subordinated notes | 2059 Junior Subordinated Notes      
Debt Instrument [Line Items]      
Par value $ 300,000,000.0    
Stated interest rate 5.875%    
Junior subordinated notes | 2059 Junior Subordinated Notes | On or after September 30, 2026      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Junior subordinated notes | 2059 Junior Subordinated Notes | If changes in tax laws and interpretations occur      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Junior subordinated notes | 2059 Junior Subordinated Notes | If a rating agency makes certain changes relating to the equity credit criteria for securities      
Debt Instrument [Line Items]      
Redemption price percentage 102.00%    
Junior subordinated notes | 2060 Junior Subordinated Notes      
Debt Instrument [Line Items]      
Par value $ 275,000,000.0    
Stated interest rate 4.75%    
Junior subordinated notes | 2060 Junior Subordinated Notes | On or after September 30, 2026      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Junior subordinated notes | 2060 Junior Subordinated Notes | If changes in tax laws and interpretations occur      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Junior subordinated notes | 2060 Junior Subordinated Notes | If a rating agency makes certain changes relating to the equity credit criteria for securities      
Debt Instrument [Line Items]      
Redemption price percentage 102.00%    
Junior subordinated notes | 2061 Junior Subordinated Notes      
Debt Instrument [Line Items]      
Par value $ 200,000,000.0    
Stated interest rate 4.20%    
Junior subordinated notes | 2061 Junior Subordinated Notes | On or after September 30, 2026      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Junior subordinated notes | 2061 Junior Subordinated Notes | If changes in tax laws and interpretations occur      
Debt Instrument [Line Items]      
Redemption price percentage 100.00%    
Junior subordinated notes | 2061 Junior Subordinated Notes | If a rating agency makes certain changes relating to the equity credit criteria for securities      
Debt Instrument [Line Items]      
Redemption price percentage 102.00%    
Junior convertible securities      
Debt Instrument [Line Items]      
Debt $ 338,900,000 338,600,000  
Junior convertible securities | Junior Convertible Trust Preferred Securities      
Debt Instrument [Line Items]      
Debt $ 341,700,000    
Stated interest rate 5.15%    
Unamortized debt issuance expense $ 2,900,000 3,100,000  
Conversion ratio (in shares) 0.2558    
Face amount of convertible security (in dollars per share) | $ / shares $ 50.00    
Conversion price (in dollars per share) | $ / shares $ 195.47    
Number of trading days closing price has exceeded threshold | d 20    
Number of consecutive trading days | d 30    
Debt instrument, convertible, threshold percentage 1.30    
Deferred tax liability $ 9,000,000    
Repayments of convertible debt   60,900,000  
Deferred tax liabilities, net, decrease resulting from repurchase of junior convertible securities   $ 11,400,000