Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Period	$ 1.0	$ 0.5	$ 0.3
Charge to Expenses	0.0	0.8	0.4
Deductions/(Additions)	0.0	0.3	0.2
Beginning of Period	1.0	1.0	0.5
Deferred Tax Valuation Allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Period	5.7	3.6	1.9
Charge to Expenses	0.6	2.1	1.7
Deductions/(Additions)	0.0	0.0	0.0
Beginning of Period	$ 6.3	$ 5.7	$ 3.6