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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Effective Income Tax Rate Reconciliation [Line Items]          
Deferred tax assets, net of valuation allowance $ 272.2 $ 340.9 $ 272.2 $ 340.9  
Deferred tax liabilities 5.5 8.9 5.5 8.9  
Valuation allowance 16.9 18.2 16.9 18.2  
Reserves for uncertain tax positions 197.4   197.4   $ 197.9
Uncertain tax positions, related tax benefits 16.0   16.0   $ 3.7
Non-US | Luxembourg          
Effective Income Tax Rate Reconciliation [Line Items]          
Deferred foreign tax benefits 6.1   85.1    
Non-US | Guyana and Luxembourg          
Effective Income Tax Rate Reconciliation [Line Items]          
Deferred foreign tax benefits   $ 36.2      
Non-US | Guyana, Nigeria, Switzerland, and Luxembourg          
Effective Income Tax Rate Reconciliation [Line Items]          
Deferred foreign tax benefits       $ 117.8  
Non-US | Luxembourg and Switzerland          
Effective Income Tax Rate Reconciliation [Line Items]          
Deferred foreign tax benefits 6.1   85.1    
Non-US And US | Guyana, Luxembourg, Switzerland, And United States          
Effective Income Tax Rate Reconciliation [Line Items]          
Tax expenses related to various recurring items $ 37.9   $ 214.3