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
Valuation and Qualifying Accounts
Balance at beginning of period	$ 33.5	$ 23.0	$ 23.6
Charged to cost and expenses	1.2	13.0	1.8
Additions (Deductions)	(1.1)	(2.5)	(2.4)
Balance at end of period	33.6	33.5	23.0
Valuation allowance on deferred tax assets
Valuation and Qualifying Accounts
Balance at beginning of period	34.7	39.6	37.2
Charged to cost and expenses	0.2	(3.8)	2.5
Additions (Deductions)	0.3	(1.1)	(0.1)
Balance at end of period	$ 35.2	$ 34.7	$ 39.6