Employee Benefit Plans Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Current Pension Liability	$ 1.6	$ 1.2
Noncurrent Pension Liability	114.2	127.8
Noncurrent Pension Asset	0.0	0.0
Funded Status of Plan	115.8	129.0
Net Actuarial Gain (Loss) in Balance Sheet	20.9	13.7
Prior Service Credit in Balance Sheet	3.3	3.5
Pension Recognized in Balance Sheet, Gross of Deferred Tax	24.2	17.2
Pension Deferred Tax Asset in Balance Sheet	3.2	4.7
Pension Recognized in Balance Sheet, Net of Deferred Tax	27.4	21.9	$ 19.3
Domestic Plan | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Current Pension Liability	7.3	7.2
Noncurrent Pension Liability	471.1	547.1
Noncurrent Pension Asset	0.0	0.0
Funded Status of Plan	478.4	554.3
Net Actuarial Gain (Loss) in Balance Sheet	(672.6)	(746.4)
Prior Service Credit in Balance Sheet	(0.7)	(0.7)
Pension Recognized in Balance Sheet, Gross of Deferred Tax	(673.3)	(747.1)
Pension Deferred Tax Asset in Balance Sheet	236.0	251.8
Pension Recognized in Balance Sheet, Net of Deferred Tax	(437.3)	(495.3)	(451.3)
Foreign Plan | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Current Pension Liability	0.0	0.0
Noncurrent Pension Liability	0.0	0.0
Noncurrent Pension Asset	(6.0)	(9.7)
Funded Status of Plan	(6.0)	(9.7)
Net Actuarial Gain (Loss) in Balance Sheet	(48.9)	(46.3)
Prior Service Credit in Balance Sheet	(0.3)	0.0
Pension Recognized in Balance Sheet, Gross of Deferred Tax	(49.2)	(46.3)
Pension Deferred Tax Asset in Balance Sheet	11.9	11.6
Pension Recognized in Balance Sheet, Net of Deferred Tax	$ (37.3)	$ (34.7)	$ (33.1)