Summary of Significant Accounting Policies (PPE) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Finance lease assets, accumulated amortization		$ 7,100,000	$ 6,700,000
Asset Retirement Obligation		0	0
Property, Plant and Equipment
Property, Plant and Equipment, Gross		1,731,100,000	1,783,000,000
Less accumulated depreciation		(757,600,000)	(684,900,000)
Property, plant and equipment, net		973,500,000	1,098,100,000
Land
Property, Plant and Equipment
Property, Plant and Equipment, Gross		8,300,000	10,600,000
Building and improvements (10 to 40 years)
Property, Plant and Equipment
Property, Plant and Equipment, Gross		$ 37,400,000	36,800,000
Building and improvements (10 to 40 years) | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Building and improvements (10 to 40 years) | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		40 years
Machinery and equipment (10 to 20 years)
Property, Plant and Equipment
Property, Plant and Equipment, Gross		$ 1,607,300,000	1,641,700,000
Machinery and equipment (10 to 20 years) | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Machinery and equipment (10 to 20 years) | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Furniture and fixtures (5 to 10 years)
Property, Plant and Equipment
Property, Plant and Equipment, Gross		$ 47,900,000	48,300,000
Furniture and fixtures (5 to 10 years) | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Furniture and fixtures (5 to 10 years) | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Assets under finance leases (1 to 7 years)
Property, Plant and Equipment
Property, Plant and Equipment, Gross	[1]	$ 10,300,000	21,900,000
Assets under finance leases (1 to 7 years) | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		4 years
Assets under finance leases (1 to 7 years) | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		26 years
Construction-in-progress
Property, Plant and Equipment
Property, Plant and Equipment, Gross		$ 19,900,000	$ 23,700,000

[1] Assets under finance leases consist of buildings and machinery and equipment. As of December 31, 2019 and 2018, finance lease assets are recorded net of accumulated amortization of $7.1 million and $6.7 million, respectively.