SCHEDULE II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts
Allowance for valuation and qualifying accounts
Balance at Beginning of Period	$ 31.4	$ 28.1	$ 23.8
Additions	9.3	11.4	8.6
Deductions	(0.2)	(8.1)	(4.3)
Balance at End of Period	40.5	31.4	28.1
Tax-Related valuation allowance
Allowance for valuation and qualifying accounts
Balance at Beginning of Period	158.8	119.0	95.6
Additions	86.4	39.8	23.4
Balance at End of Period	$ 245.2	$ 158.8	$ 119.0