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Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Reserve For Accounts Receivable [Member]      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning Balance $ 23.9 $ 23.5 $ 52.3
Valuation Allowances and Reserves, Charged to Cost and Expense 23.4 20.6 18.3
Valuation Allowances and Reserves, Charged to Other Accounts (36.6) (36.4) (6.4)
Deductions for Purposes for which Reserves were Created 61.0 56.6 53.5
Ending Balance 22.9 23.9 23.5
Reserve For Other Investments [Member]      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning Balance 1.0 2.3 0.0
Valuation Allowances and Reserves, Charged to Cost and Expense 0.0 0.0 0.0
Valuation Allowances and Reserves, Charged to Other Accounts     (2.3)
Deductions for Purposes for which Reserves were Created 0.0 0.0 0.0
Ending Balance 1.3 1.0 $ 2.3
Reserve for Deferred Charges and Other      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Valuation Allowances and Reserves, Charged to Other Accounts $ 0.3 $ 1.3