SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 11.1	$ 5.1	$ 2.7
Charged to Cost and Expenses	13.2	13.7	15.1
Deductions	(10.0)	(7.7)	(12.8)
Other	0.0	0.0	0.1
Balance at End of Year	14.3	11.1	5.1
Deferred Tax Asset Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	162.9	39.2	0.3
Charged to Cost and Expenses	17.3	34.1	29.0
Deductions	0.0	0.0	0.0
Other	31.2	89.6	9.9
Balance at End of Year	$ 211.4	$ 162.9	$ 39.2