Acquisitions (Details) (Alcan Packaging Food Americas, USD $) Share data in Millions, unless otherwise specified	1 Months Ended		3 Months Ended	12 Months Ended		24 Months Ended
	Jul. 31, 2010	Mar. 31, 2010	Sep. 30, 2009	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010	Mar. 02, 2010
Alcan Packaging Food Americas
Business acquisition
Number of facilities acquired		23
Net sales reported by the acquired entity for the last annual period					$ 1,400,000,000
Number of facilities divested	2
Net sales from disposal group					156,000,000
Purchase price for the acquisition
Cash consideration							1,210,491,000
Assumption of liabilities of seller							7,092,000
Purchase price							1,217,583,000
Public bonds issued			800,000,000
Common shares issued (in shares)			8.2
Acquisition-related fees				15,600,000	43,800,000	59,400,000
Goodwill deductible for tax purposes							308,500,000
Other long-term assets related to indemnity provisions of the sale and purchase agreement							17,900,000
Estimated fair values of assets acquired and liabilities assumed
Cash and cash equivalents							22,090,000
Accounts receivable, net							145,874,000
Inventories							179,536,000
Prepaid expenses and other current assets							8,291,000
Working capital of discontinued operations							8,452,000
Property and equipment							458,846,000
Goodwill							353,296,000
Other intangible assets							130,300,000
Long-term assets of discontinued operations							63,985,000
Other long-term assets							19,693,000
Accounts payable							(125,678,000)
Accrued salaries and wages							(12,088,000)
Accrued income and other taxes							139,000
Deferred income taxes							(2,921,000)
Long-term liabilities							(32,232,000)
Purchase price							$ 1,217,583,000