Schedule II (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 15.4	$ 15.9	$ 13.7
Additions	5.5	2.3	3.5
Deductions	(4.9)	(2.8)	(1.3)
Balance at End of Year	16.0	15.4	15.9
Valuation Allowance for Deferred Tax Assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	159.0	214.2	135.4
Additions	44.9	11.9	78.8
Deductions	(25.6)	(67.1)	0.0
Balance at End of Year	$ 178.3	$ 159.0	$ 214.2