Derivatives (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	$ 280.7	$ 273.3	$ 842.8	$ 838.3
Net Foreign Currency Transaction Losses	(0.6)	(0.3)	(0.6)	(1.4)
Revenue Benchmark [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	280.7	273.3	842.8	838.3
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	(0.1)	(0.1)	(0.1)	(0.2)
Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Income	0.8	0.8	2.5	2.5
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	0.7	0.6	2.1	1.7
Foreign Currency Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net Foreign Currency Transaction Losses	(0.6)	(0.3)	(0.6)	(1.4)
Gain (Loss) on Foreign Currency Cash Flow Hedge Ineffectiveness	$ 7.1	$ 0.9	$ 8.1	$ 6.1