Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of Period	$ 12.4	$ 12.4	$ 12.2
Charge (Benefit) to Expenses	9.4	8.5	10.4
To (from) Other Accounts	(2.0)	0.0	0.0
Deductions	9.9	8.5	10.2
End of Period	9.9	12.4	12.4
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of Period	58.4	64.4	68.3
Charge (Benefit) to Expenses	(3.6)	(5.5)	(1.1)
To (from) Other Accounts	(0.4)	(0.5)	(2.8)
Deductions	0.0	0.0	0.0
End of Period	$ 54.4	$ 58.4	$ 64.4