Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Reportable segments			2
Net sales	$ 344.5	$ 324.8	$ 683.9	$ 641.1
Operating profit	42.5	35.6	85.9	77.3
Loss on debt extinguishment	0	11.6	0.2	11.6
Interest expense	4.1	4.6	8.7	8.8
Interest income	0.4	0.6	1.0	1.0
Income before income taxes	38.8	20.0	78.0	57.9
Packaging Systems [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	251.5	235.8	503.0	471.5
Operating profit	56.8	50.5	115.5	104.1
Delivery Systems [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	93.3	89.2	181.5	169.9
Operating profit	2.3	5.5	3.5	7.8
Intersegment Sales [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	(0.3)	(0.2)	(0.6)	(0.3)
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	(16.6)	(16.5)	(33.1)	(30.1)
Other Unallocated Items [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	0	(3.9)	0	(4.5)
Convertible Debt Due 2047 [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Loss on debt extinguishment		$ (11.6)	$ 0.2	$ (11.6)
Percentage Of Convertible Debt Repurchased				98.06%