Segment Information (Segment Financial Information) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating profit	$ 182.0us-gaap_OperatingIncomeLoss	$ 162.4us-gaap_OperatingIncomeLoss	$ 135.1us-gaap_OperatingIncomeLoss
Loss on debt extinguishment	0	(0.2)	(11.6)
Interest expense, net	(13.0)	(15.1)	(14.9)
Income before income taxes	169.0	147.1	108.6
Segment assets	1,670.9us-gaap_Assets	1,671.6us-gaap_Assets	1,564.0us-gaap_Assets
Capital expenditures	111.9	151.9	131.3
Depreciation and amortization expense	90.0	85.2	76.9
Packaging Systems [Member]
Segment Reporting Information [Line Items]
Operating profit	223.0	217.0	187.5
Loss on debt extinguishment		0	0
Interest expense, net	0	0	0
Income before income taxes	223.0	217.0	187.5
Segment assets	1,024.3	1,048.9	942.7
Capital expenditures	76.5	81.3	74.3
Depreciation and amortization expense	58.3	55.5	52.7
Delivery Systems [Member]
Segment Reporting Information [Line Items]
Operating profit	13.5	9.4	18.4
Loss on debt extinguishment		0	0
Interest expense, net	0	0	0
Income before income taxes	13.5	9.4	18.4
Segment assets	405.1	429.3	389.3
Capital expenditures	35.8	28.5	24.5
Depreciation and amortization expense	23.0	20.9	18.4
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating profit	(54.5)	(64.0)	(70.8)
Loss on debt extinguishment		(0.2)	(11.6)
Interest expense, net	(13.0)	(15.1)	(14.9)
Income before income taxes	(67.5)	(79.3)	(97.3)
Segment assets	241.5	193.4	232.0
Capital expenditures	(0.4)	42.1	32.5
Depreciation and amortization expense	$ 8.7	$ 8.8	$ 5.8

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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