Restructuring and Other Expense - Components of Restructuring and Other Expense (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
		Aug. 13, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Severance and related			$ 17.5	$ 0.8	$ 18.4	$ 3.6
Lease termination costs			0.0	0.2	0.0	0.3
Other			0.2	0.3	0.6	1.2
Total restructuring			17.7	1.3	19.0	5.1
Pension settlement/curtailment (Note 9)			1.0	0.2	1.0	0.1
Settlement of UK pension plan			0.0	0.5	0.0	0.5
Loss on settlement of pension plan			25.1	0.0	25.1	0.0
Other	[1]		(3.6)	2.2	(2.2)	5.8
Total			40.2	$ 4.2	42.9	$ 11.5
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment, net			5.3		5.3		$ 45.0
Building
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment, net			32.0		32.0
Assets held for sale			10.4		10.4
Restructuring and other | Building
Restructuring Cost and Reserve [Line Items]
Impairment of assets to be disposed of			21.6
RDX Storage
Restructuring Cost and Reserve [Line Items]
Gain on sale of business			$ 4.8		$ 4.8
RDX Storage | Restructuring and other
Restructuring Cost and Reserve [Line Items]
Gain on sale of business		$ 4.8

[1] The $25.1 million of asset disposals / asset write down primarily consists of a write down of our corporate headquarters facility. During the third quarter of 2015, based on the Board of Director's and management's decision to sell this facility in light of the other restructuring activities that were approved in September 2015, we classified our corporate headquarters facility as an asset held for sale. The carrying value of our corporate headquarters facility of $32.0 million was subsequently written down to $10.4 million which is its estimated fair value based on negotiations with a third party with interest in purchasing our corporate headquarters. The $21.6 million write down was charged to restructuring and other expense in the Condensed Consolidated Statement of Operations.