Cost Reduction Plans - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Restructuring and Related Activities [Abstract]
Estimated restructuring and related costs over next four years	$ 235.1
Capital expenditures expected over next four years	60.5
Restructuring plan cost	97.9
Capital expenditures to support the CIP	36.6
Accelerated depreciation	$ 0.7	$ 2.2