Derivatives (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	$ 299.7	$ 292.2	$ 562.1	$ 565.0
Interest Income		0.9		1.7
Foreign Currency Transaction Gain (Loss), Realized		(0.3)		(1.1)
Sales Revenue, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	299.7	292.2	562.1	565.0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0.0	(0.8)	0.0	(0.1)
Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Income	0.9		1.7
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	0.7	0.6	1.4	$ 1.1
Foreign Currency Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign Currency Transaction Gain (Loss), Realized	(0.2)		0.0
Gain (Loss) on Foreign Currency Cash Flow Hedge Ineffectiveness	$ (2.1)	$ 10.3	$ 1.0		$ 5.2