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Financial Instruments and Other Guarantees - Narratives (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jan. 18, 2024
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Feb. 13, 2023
Guarantee Obligations [Line Items]              
Interest expense, net of capitalized interest   $ 11.1 $ 10.7 $ 22.6 $ 25.4    
Restricted Cash   714.2   714.2   $ 682.2  
Cash-backed bank guarantee facilities   202.4   202.4      
Capitalized debt issuance costs related to ARS amendment   1.7          
Letter of Credit              
Guarantee Obligations [Line Items]              
Letters of credit outstanding, amount   49.3   49.3      
Line of Credit Facility, Commitment Fee Percentage 0.50%            
Line of credit facility, maximum borrowing capacity   $ 250.0   $ 250.0      
Cash Collateral, Percentage of the aggregate amount of letters of credit outstanding   103.00%   103.00%      
Stated interest rate   0.75%   0.75%      
Collateralized Letter of Credit Agreement              
Guarantee Obligations [Line Items]              
Letters of credit outstanding, amount   $ 115.6   $ 115.6      
Cash-collateralized Letters of Credit   119.1   119.1      
Surety Trust Account              
Guarantee Obligations [Line Items]              
Restricted Cash   392.7   392.7   $ 394.6  
Accounts Receivable Securitization Program              
Guarantee Obligations [Line Items]              
Line of credit facility, maximum borrowing capacity             $ 225.0
Accounts Receivable Securitization Program | Secured debt              
Guarantee Obligations [Line Items]              
Letters of credit outstanding, amount   58.6   $ 58.6      
Basis spread on variable rate       2.10%      
Maximum              
Guarantee Obligations [Line Items]              
Basis spread on variable rate 3.25%            
Maximum | Letter of Credit              
Guarantee Obligations [Line Items]              
Basis spread on variable rate 4.25%            
Transaction support agreements, additional collateral demands   5.0   $ 5.0      
Minimum              
Guarantee Obligations [Line Items]              
Basis spread on variable rate 2.50%            
Minimum | Letter of Credit              
Guarantee Obligations [Line Items]              
Basis spread on variable rate 3.50%            
Surety Bond              
Guarantee Obligations [Line Items]              
Surety Agreement Liquidity Covenant, Amount   400.0   400.0      
Difference between penal sum of all surety bonds and amount of collateral posted in favor of surety providers   494.4   494.4      
Collateral amount held in trust account   392.7   392.7      
Collateral amount held in letters of credit   $ 126.9   $ 126.9      
Surety Bond | Maximum              
Guarantee Obligations [Line Items]              
Net Leverage Ratio   1.5   1.5      
Debt Instrument, Collateral   519.6 million          
Surety Bond | Minimum              
Guarantee Obligations [Line Items]              
Net Leverage Ratio   1.0   1.0      
Senior Notes | 3.250% Convertible Senior Notes due March 2028 (2028 Convertible Notes)              
Guarantee Obligations [Line Items]              
Debt Instrument, Funded, Percent   50.00%   50.00%      
Stated interest rate   3.25%   3.25%      
Secured debt | Accounts Receivable Securitization Program              
Guarantee Obligations [Line Items]              
Outstanding borrowings   $ 0.0   $ 0.0      
Accounts Receivable from Securitization   102.3   102.3      
Interest expense, net of capitalized interest   $ 0.6 $ 0.6 $ 1.2 $ 1.4