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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Assets    
Trade receivables, allowances $ 60.8 $ 70.7
Contract with Customer, Asset, Allowance for Credit Loss, Current 1.6 1.6
Property and equipment, accumulated depreciation 1,161.6 1,039.1
Finite-Lived Intangible Assets, Accumulated Amortization 670.8 563.0
Investments, Fair Value Disclosure 742.0 740.8
Liabilities and Equity    
Unamortized Debt Issuance Expense $ 0.7 $ 0.0
Company shareholders' equity    
Common stock, par value (in dollars per share) $ 0.01  
Common stock, shares authorized (in shares) 100,000,000  
Common stock, shares issued (in shares) 52,120,548 52,120,548
Common stock, shares outstanding (in shares) 47,415,584 47,509,750
Treasury Stock, Shares 4,704,964 4,610,798
Line of Credit [Member]    
Liabilities and Equity    
Unamortized Debt Issuance Expense $ 11.4 $ 14.4
Long-Term Senior Notes [Member]    
Liabilities and Equity    
Unamortized Debt Issuance Expense_Senior Notes $ 6.4 $ 8.1