Commitments and Contingencies Loss Contingency (Details)	1 Months Ended	3 Months Ended				1 Months Ended		12 Months Ended					6 Months Ended	1 Months Ended	3 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2009 CAD	Jun. 25, 2011 USD ($)	Jun. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jun. 30, 2007 USD ($)	Sep. 30, 2011 BRI CAD	Jun. 25, 2011 BRI CAD	Dec. 31, 2011 RMMC [Member] USD ($)	Jun. 30, 2012 RMMC [Member] USD ($)	Dec. 25, 2010 RMMC [Member] USD ($)	Jun. 30, 2012 Kaiser purchased tax credits indemnity reserve, category two USD ($)	Jun. 30, 2012 Kaiser purchased tax credits indemnity reserve USD ($) categories	Jun. 30, 2012 Kaiser tax, civil and labor indemnity reserve USD ($)	Oct. 31, 2010 Litigation on product distribution in Brazil USD ($)	Mar. 27, 2010 Litigation on product distribution in Brazil USD ($)	Sep. 26, 2009 Litigation on product distribution in Brazil USD ($)	Dec. 31, 2000 Litigation on product distribution in Brazil USD ($)	Jun. 30, 2012 Litigation on product distribution in Brazil USD ($)	Dec. 31, 1990 Environmental matters, Lowry USD ($)	Jun. 30, 2012 Environmental matters, Lowry USD ($)	Oct. 31, 2006 Environmental matters, Cooper Drum site	Jun. 30, 2012 MillerCoors RMMC [Member]
Loss Contingencies [Line Items]
Loss contingency, number of categories												2
Indemnity liability, current												$ 8,000,000
Maximum potential claims											220,100,000		68,000,000
Total estimate of indemnity liability												20,000,000
Indemnity liability, noncurrent												12,000,000	8,400,000
Equity interest sold (as a percent)													68.00%
Guarantees
Debt face amount					575,000,000		200,000,000
Equity Method Investment, Ownership Percentage																						50.00%
Gain on liability reduction recorded in special items		2,000,000
Payments of Capital Distribution						93,600,000
Guarantor Obligations, Maximum Exposure, Undiscounted									9,100,000	29,600,000
Letter of Credit Provided to Entity	10,000,000
Short-term Debt, Refinanced, Amount								16,000,000
Guarantees related to banks and other third parties noncurrent portion			6,100,000	6,100,000
Litigation and Other Disputes
Litigation, vacated court judgment														42,000,000	42,000,000	42,000,000
Settlement agreement, payment for termination of distribution agreement																	150,000
Environmental
Environmental remediation expense, pretax charge																			30,000,000
Environmental remediation threshold, assumed remediation cost																				120,000,000
Inflation rate assumption, future costs (as a percent)																				2.50%
Risk free rate of return assumption (as a percent)																				1.69%
Site contingency, accrual, present value																				4,300,000
Site contingency, accrual, undiscounted amount																				7,800,000
Number of PRP parties																					60
Accrued Liabilities, Litigations and Disputes			22,200,000	15,300,000
Disposal Group Including Discontinued Operation, Current, Legal Reserves			$ 6,300,000	$ 4,800,000														$ 6,300,000