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Schedule II - 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, Allowance, Credit Loss [Member]      
Balance $ 14.3 $ 15.4 $ 14.1
Charged to Expenses / Against Revenue [1] 8.7 6.4 13.8
Deductions - Write-offs [2] (7.9) (7.5) (12.5)
Balance 15.1 14.3 15.4
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]      
Balance 45.3 38.3 30.6
Charged to Expenses / Against Revenue [1] 1.2 41.2 8.1
Deductions - Write-offs [2] (40.9) (34.2) (0.4)
Balance $ 5.6 $ 45.3 $ 38.3
[1] Primarily additional reserves for bad debts
[2] Primarily accounts receivable balances written off, net of recoveries, the expiration of loss carryforwards, and businesses held for sale