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Debt - Senior Notes and Debentures (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Dec. 31, 2023
Mar. 31, 2023
Debt Instrument [Line Items]              
Loss on extinguishment of debt $ 2.4 $ 0.0 $ 2.4 $ 0.2      
Senior notes: April 2029              
Debt Instrument [Line Items]              
Principal $ 750.0   $ 750.0     $ 750.0  
Interest rate 4.875%   4.875%     4.875% 4.875%
Senior Notes Due April 2029 March Issuance              
Debt Instrument [Line Items]              
Principal             $ 400.0
Senior Notes Due April 2029 December Issuance              
Debt Instrument [Line Items]              
Principal           $ 350.0  
Senior notes: April 2034              
Debt Instrument [Line Items]              
Principal $ 800.0   $ 800.0     800.0 $ 800.0
Interest rate 5.00%   5.00%       5.00%
Senior notes: December 2033              
Debt Instrument [Line Items]              
Principal $ 650.0   $ 650.0     $ 650.0  
Interest rate 5.00%   5.00%     5.00%  
Senior notes: November 2029              
Debt Instrument [Line Items]              
Principal $ 400.0   $ 400.0   $ 400.0 $ 0.0  
Interest rate 5.00%   5.00%   5.00%    
Senior notes: November 2034              
Debt Instrument [Line Items]              
Principal $ 500.0   $ 500.0   $ 500.0 $ 0.0  
Interest rate 5.20%   5.20%   5.20%