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Valuation And Qualifying Accounts And Reserves (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Less: Net Charge-offs/(Recoveries) and Other $ 22.0 $ 1.2  
Allowance for doubtful receivables      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 39.0 37.0 $ 42.0
Charged to cost and expenses (6.5) 3.2 (3.4)
Deductions 22.0 1.2 1.6
Balance at end of period 10.5 39.0 37.0
Tax valuation allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 15.7 16.2 18.1
Charged to cost and expenses 0.8 (0.4) (0.1)
Deductions (1.2) 0.1 1.8
Balance at end of period $ 17.7 $ 15.7 $ 16.2