Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Information [Abstract]
Reportable segments			2
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 324.8	$ 307.9	$ 641.1	$ 603.3
Total operating profit	35.6	27.8	77.3	56.5
Loss on debt extinguishment	11.6	0	11.6	0
Interest expense	4.6	4.6	8.8	9.3
Interest income	0.6	0.3	1.0	0.5
Income before income taxes	20.0	23.5	57.9	47.7
Purchase of convertible debentures (in hundredths)			98.06%
Purchase Premium Paid Convertible Debt			6.2
Write off of unamortized debt issuance costs			4.4
Debt transaction costs			1.0
Packaging Systems [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	235.8	222.2	471.5	438.0
Total operating profit	50.5	38.1	104.1	80.1
Delivery Systems [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	89.2	86.4	169.9	166.9
Total operating profit	5.5	2.4	7.8	4.2
Intersegment Sales [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	(0.2)	(0.7)	(0.3)	(1.6)
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating profit	(16.5)	(10.0)	(30.1)	(23.2)
Other Unallocated Items [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating profit	$ (3.9)	$ (2.7)	$ (4.5)	$ (4.6)