Reportable Business Segment Information (Parenthetical) (Detail) (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 Reporting Information [Line Items]
Amortization of debt discount and issuance costs excluded from depreciation and amortization	$ 1.2	$ 0.8	$ 2.5	$ 1.6
Metal Containers
Segment Reporting Information [Line Items]
New plant start-up costs	1.9		2.9
Charge related to resolution of past product liability dispute		3.3		3.3
Corporate
Segment Reporting Information [Line Items]
Costs attributable to announced acquisitions	0.7		0.7
Income as result of proceeds received from termination of the Graham Packaging merger agreement net of costs		$ 27.0		$ 25.2