Reportable Business Segment Information (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended					12 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Mar. 31, 2010	Dec. 31, 2010	Dec. 31, 2011 Metal Containers	Dec. 31, 2011 Corporate	Dec. 31, 2010 Closures
Segment Reporting Information [Line Items]
Charge related to resolution of past product liability dispute	$ 3.3						$ 3.3
Income as result of proceeds received from termination of the Graham Packaging merger agreement net of costs	27.0							25.2
Charge included for the remeasurement of net assets					3.2				3.2
Costs attributable to announced acquisitions		$ 1.8	$ 2.2	$ 0.5		$ 2.7