v3.26.1
Fair Value Measurements - Schedule of Carrying Amounts and Estimated Fair Values by Input Level (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 16, 2026
Dec. 31, 2025
May 31, 2020
Senior Notes | 5.625% Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Interest rate 5.625%   5.625%  
Senior Notes | 4.125% Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Interest rate 4.125%   4.125%  
Senior Notes | 6.75% Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Interest rate 6.75%      
Convertible Notes        
Financial liabilities:        
Long-term debt $ 26.4   $ 26.4  
Convertible Notes | 6.75% Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Interest rate 6.75% 6.75%    
Convertible Notes | Convertible Notes        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Interest rate 2.75%     2.75%
Level 1        
Financial assets:        
Cash and cash equivalents $ 887.2   686.6  
Available-for-sale debt securities 0.0   0.0  
Held-to-maturity securities 0.0   0.0  
Promissory notes 0.0   0.0  
Financial liabilities:        
Other liabilities 0.0   0.0  
Level 1 | Amended Credit Facilities        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 1 | Senior Notes | 5.625% Notes        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 1 | Senior Notes | 4.125% Notes        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 1 | Senior Notes | 6.75% Notes        
Financial liabilities:        
Long-term debt 0.0      
Level 1 | Convertible Notes | Convertible Notes        
Financial liabilities:        
Long-term debt     0.0  
Level 1 | Other long-term obligations        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 2        
Financial assets:        
Cash and cash equivalents 0.0   0.0  
Available-for-sale debt securities 0.0   0.0  
Held-to-maturity securities 6.7   6.7  
Promissory notes 7.9   7.9  
Financial liabilities:        
Other liabilities 2.7   2.7  
Level 2 | Amended Credit Facilities        
Financial liabilities:        
Long-term debt 1,394.9   1,993.0  
Level 2 | Senior Notes | 5.625% Notes        
Financial liabilities:        
Long-term debt 399.5   399.0  
Level 2 | Senior Notes | 4.125% Notes        
Financial liabilities:        
Long-term debt 382.0   368.0  
Level 2 | Senior Notes | 6.75% Notes        
Financial liabilities:        
Long-term debt 601.5      
Level 2 | Convertible Notes | Convertible Notes        
Financial liabilities:        
Long-term debt     105.6  
Level 2 | Other long-term obligations        
Financial liabilities:        
Long-term debt 6.8   7.3  
Level 3        
Financial assets:        
Cash and cash equivalents 0.0   0.0  
Available-for-sale debt securities 26.4   26.4  
Held-to-maturity securities 0.0   0.0  
Promissory notes 0.0   0.0  
Financial liabilities:        
Other liabilities 39.2   40.1  
Level 3 | Amended Credit Facilities        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 3 | Senior Notes | 5.625% Notes        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 3 | Senior Notes | 4.125% Notes        
Financial liabilities:        
Long-term debt 0.0   0.0  
Level 3 | Senior Notes | 6.75% Notes        
Financial liabilities:        
Long-term debt 0.0      
Level 3 | Convertible Notes | Convertible Notes        
Financial liabilities:        
Long-term debt     0.0  
Level 3 | Other long-term obligations        
Financial liabilities:        
Long-term debt 0.0   0.0  
Carrying Amount        
Financial assets:        
Cash and cash equivalents 887.2   686.6  
Available-for-sale debt securities 26.4   26.4  
Held-to-maturity securities 6.7   6.7  
Promissory notes 7.9   7.9  
Financial liabilities:        
Other liabilities 41.9   42.8  
Carrying Amount | Amended Credit Facilities        
Financial liabilities:        
Long-term debt 1,379.8   1,975.8  
Carrying Amount | Senior Notes | 5.625% Notes        
Financial liabilities:        
Long-term debt 399.9   399.8  
Carrying Amount | Senior Notes | 4.125% Notes        
Financial liabilities:        
Long-term debt 396.9   396.4  
Carrying Amount | Senior Notes | 6.75% Notes        
Financial liabilities:        
Long-term debt 590.2      
Carrying Amount | Convertible Notes | Convertible Notes        
Financial liabilities:        
Long-term debt     106.5  
Carrying Amount | Other long-term obligations        
Financial liabilities:        
Long-term debt 7.8   8.6  
Fair Value        
Financial assets:        
Cash and cash equivalents 887.2   686.6  
Available-for-sale debt securities 26.4   26.4  
Held-to-maturity securities 6.7   6.7  
Promissory notes 7.9   7.9  
Financial liabilities:        
Other liabilities 41.9   42.8  
Fair Value | Amended Credit Facilities        
Financial liabilities:        
Long-term debt 1,394.9   1,993.0  
Fair Value | Senior Notes | 5.625% Notes        
Financial liabilities:        
Long-term debt 399.5   399.0  
Fair Value | Senior Notes | 4.125% Notes        
Financial liabilities:        
Long-term debt 382.0   368.0  
Fair Value | Senior Notes | 6.75% Notes        
Financial liabilities:        
Long-term debt 601.5      
Fair Value | Convertible Notes | Convertible Notes        
Financial liabilities:        
Long-term debt     105.6  
Fair Value | Other long-term obligations        
Financial liabilities:        
Long-term debt $ 6.8   $ 7.3