Restructuring and Other Expense - Components of Restructuring and Other Expense (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring and Related Activities [Abstract]
Severance and related		$ 0.0	$ 0.0	$ 0.0	$ 0.1
Total Restructuring		0.0	0.0	0.0	0.1
Pension settlement/curtailment (Note 9)		1.1	0.0	2.3	0.0
Asset disposals / write down		(0.2)	0.0	0.1	0.0
Other	[1]	(1.9)	0.9	3.4	1.4
Total Other		(1.0)	0.9	5.8	1.4
Total Restructuring and Other		(1.0)	$ 0.9	5.8	$ 1.5
Restructuring Cost and Reserve [Line Items]
Property tax refund		$ 1.9		1.9
Other employee costs and consulting fees related to restructuring				2.0
Consulting Expenses with Realization Services | Realization Services, Inc.
Restructuring Cost and Reserve [Line Items]
Consulting expenses				2.1
Otterbourg P.C. | Realization Services, Inc.
Restructuring Cost and Reserve [Line Items]
Consulting expenses				$ 1.2

[1] For the three months ended June 30, 2016, other includes a net credit of $1.9 million for a property tax refund for the former Oakdale site. For the six months ended June 30, 2016, other includes consulting expenses of $2.1 million and $1.2 million for Realization Services, Inc. and Otterbourg P.C., respectively, a net credit of $1.9 million for property tax refund for the former Oakdale site, as well as $2.0 million for other employee costs and consulting fees directly attributable to our Restructuring Plan. We have considered these costs to be attributable to our Corporate activities and, therefore, they are not part of our discontinued operations.