Valuation And Qualifying Accounts And Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for doubtful receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 42.0	$ 23.5	$ 20.2
Additions (Credited) to Cost and Expenses	(3.4)	17.1	2.8
Deductions	1.6	1.9	(0.5)
Balance at End of Period	37.0	42.0	23.5
Allowance for doubtful receivables | Adjusted balance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		26.8
Balance at End of Period			26.8
Tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	18.1	16.8	13.2
Additions (Credited) to Cost and Expenses	(0.1)	2.5	1.5
Deductions	1.8	1.2	(2.1)
Balance at End of Period	$ 16.2	$ 18.1	$ 16.8