Restructuring Costs Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Special Termination Benefits	$ 6.2
Severance Costs	3.4
Accelerated Share Based Compensation	2.8
Employee Retention Bonus Cost	1.7
Year 2018 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	18.3
Year 2019 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 5.0