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Long-Term Debt - Aggregate Maturities of Long-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Gross amounts due each year:    
2026 $ 0.8  
2027 24.5  
2028 0.9  
2029 556.3  
2030 1.0  
2031 and thereafter 6.2  
Subtotal 589.7  
Net amounts representing original issue premium and debt issuance costs 2.0  
Total debt $ 591.7 $ 563.4