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Debt Obligations - Schedule of Debt (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2025
Dec. 31, 2024
Aug. 31, 2025
Aug. 04, 2025
Dec. 31, 2021
Feb. 01, 2021
Debt Instrument [Line Items]              
Obligations under finance leases $ 0.2 $ 0.2          
Total aggregate finance lease and debt principal payments 700.4 700.4 $ 668.3        
Unamortized issuance discount, issuance premium, and deferred financing costs (31.3) (31.3) (5.5)        
Less: current portion of debt obligations (571.8) (571.8) (162.2)        
Debt obligations, net of current portion 97.3 97.3 500.6        
Third party fees expensed related to refinancing 4.5 4.5          
Infrastructure              
Debt Instrument [Line Items]              
Obligations under finance leases 0.2 0.2 0.6        
Total aggregate finance lease and debt principal payments 104.1 104.1 144.7        
Spectrum              
Debt Instrument [Line Items]              
Total aggregate finance lease and debt principal payments 69.7 69.7 69.7        
Life Sciences              
Debt Instrument [Line Items]              
Total aggregate finance lease and debt principal payments 46.5 46.5 24.0        
Non-Operating Corporate              
Debt Instrument [Line Items]              
Total aggregate finance lease and debt principal payments 480.1 480.1 429.9        
Secured Debt | Non-Operating Corporate              
Debt Instrument [Line Items]              
Total aggregate finance lease and debt principal payments $ 45.1 $ 45.1          
8.50% Note | Senior Notes | Spectrum              
Debt Instrument [Line Items]              
Interest rate 8.50% 8.50%     8.50%    
Outstanding debt $ 19.3 $ 19.3 19.3        
11.45% Notes | Senior Notes | Spectrum              
Debt Instrument [Line Items]              
Interest rate 11.45% 11.45%     11.45%    
Outstanding debt $ 50.4 $ 50.4 50.4        
Lancer Promissory Note | Senior Notes | Life Sciences              
Debt Instrument [Line Items]              
Outstanding debt $ 46.5 $ 46.5 24.0        
10.50% Senior Secured Notes | Secured Debt | Non-Operating Corporate              
Debt Instrument [Line Items]              
Interest rate 10.50% 10.50%   10.50%      
Outstanding debt $ 360.4 $ 360.4 0.0        
Total aggregate finance lease and debt principal payments $ 342.6 $ 342.6          
9.50% Convertible Senior Notes | Secured Debt | Non-Operating Corporate              
Debt Instrument [Line Items]              
Interest rate 9.50% 9.50%     9.50%    
Outstanding debt $ 53.5 $ 53.5 0.0        
Total aggregate finance lease and debt principal payments 52.3 52.3          
CGIC Promissory Note | Secured Debt | Non-Operating Corporate              
Debt Instrument [Line Items]              
Outstanding debt 44.1 $ 44.1 31.0        
SOFR plus 5.75% Line of Credit | Non-Operating Corporate              
Debt Instrument [Line Items]              
Basis spread on variable rate   5.75%          
Outstanding debt $ 20.0 $ 20.0 20.0        
8.50% Senior Secured Notes | Secured Debt | Non-Operating Corporate              
Debt Instrument [Line Items]              
Interest rate 8.50% 8.50%       8.50%  
Outstanding debt $ 1.9 $ 1.9 330.0        
7.50% Convertible Senior Notes | Non-Operating Corporate              
Debt Instrument [Line Items]              
Interest rate 7.50% 7.50%          
Outstanding debt $ 0.2 $ 0.2 48.9        
7.50% Convertible Senior Notes | Secured Debt | Non-Operating Corporate              
Debt Instrument [Line Items]              
Interest rate             7.50%
Revolving Credit Facility | SOFR plus 2.75% Line of Credit | Line of Credit | Infrastructure | DBM Global Credit Facilities              
Debt Instrument [Line Items]              
Basis spread on variable rate   2.75%          
Outstanding debt 20.0 $ 20.0 0.0        
Revolving Credit Facility | SOFR plus 2.75% Term Loan | Term Loan | Infrastructure | DBM Global Credit Facilities              
Debt Instrument [Line Items]              
Basis spread on variable rate   2.75%          
Outstanding debt 83.9 $ 83.9 0.0        
Revolving Credit Facility | PRIME minus 0.75% Line of Credit | Line of Credit | Infrastructure | DBM Global Credit Facilities              
Debt Instrument [Line Items]              
Basis spread on variable rate   0.75%          
Outstanding debt $ 0.0 $ 0.0 45.0        
Revolving Credit Facility | 3.25% Term Loan | Term Loan | Infrastructure | DBM Global Credit Facilities              
Debt Instrument [Line Items]              
Interest rate 3.25% 3.25%          
Outstanding debt $ 0.0 $ 0.0 $ 74.6        
Revolving Credit Facility | PRIME minus 0.75% Term Loan | Term Loan | Infrastructure | DBM Global Credit Facilities              
Debt Instrument [Line Items]              
Basis spread on variable rate   0.75% 0.75%        
Outstanding debt $ 0.0 $ 0.0 $ 24.5