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Schedule II Valuation and Qualifying Accounts and Reserves (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss [Member]      
Balance $ 17.7 $ 11.7 $ 5.7
Charged to Expenses / Against Revenue [1] 17.7 13.1 7.2
Deductions - Write-offs [2] (14.1) (7.1) (1.2)
Balance 21.3 17.7 11.7
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]      
Balance 48.0 46.5 34.5
Charged to Expenses / Against Revenue [1] 17.4 10.7 16.7
Deductions - Write-offs [2] (1.3) (9.2) (4.7)
Balance $ 64.1 $ 48.0 $ 46.5
[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