Investments Financials (Details) (MillerCoors, USD $) In Millions, unless otherwise specified	3 Months Ended						9 Months Ended						3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 29, 2012	Sep. 30, 2012		Sep. 30, 2011		Sep. 24, 2011	Sep. 29, 2012	Sep. 30, 2012		Sep. 24, 2011		Dec. 31, 2011	Sep. 30, 2011 Milwaukee Brewery Worker's Pension Plan	Sep. 30, 2011 Milwaukee Brewery Worker's Pension Plan	Sep. 30, 2011 Sparks brand	Sep. 30, 2011 Sparks brand	Sep. 30, 2012 Home draft	Sep. 30, 2012 Home draft
Condensed balance sheets
Current assets		$ 1,023.6						$ 1,023.6				$ 810.9
Noncurrent assets		8,812.4						8,812.4				8,861.7
Total assets		9,836.0						9,836.0				9,672.6
Current liabilities		900.5						900.5				922.7
Noncurrent liabilities		1,338.8						1,338.8				1,471.3
Total liabilities		2,239.3						2,239.3				2,394.0
Noncontrolling interests		31.8						31.8				36.7
Owners' equity		7,564.9						7,564.9				7,241.9
Total liabilities and equity		9,836.0						9,836.0				9,672.6
Results of operations
Net sales		1,993.5		1,964.9				5,977.3		5,796.3
Cost of goods sold		(1,201.1)		(1,213.3)				(3,582.9)		(3,545.1)
Gross profit		792.4		751.6				2,394.4		2,251.2
Operating income		310.5	[1]	179.2	[1]			1,033.9	[1]	824.3	[1]
Net income attributable to MillerCoors	306.9	306.9	[1]	176.4	[1]	176.4	1,020.5	1,020.5	[1]	809.8	[1]
Special charges for write-down of assets																	18.7	16.4
Special charges for write-down of intangible assets															60.0	60.0
Costs associated with planned assumption of pension plan													$ 50.9	$ 50.9

[1] Results for the three months and nine months ended September 30, 2012, include special charges of $18.7 million and $16.4 million, respectively, primarily due to the write-down of assets related to discontinuing the production of the Home Draft package in the U.S. Results for the three months and nine months ended September 30, 2011, include special charges of $60.0 million for a write-down in the value of the Sparks brand and a $50.9 million charge resulting from the planned assumption of the Milwaukee Brewery Worker's Pension Plan, an under-funded multi-employer pension plan.