Acquisition of Molson Coors Central Europe - Fair Value of Consideration Transferred (Details) In Millions, unless otherwise specified	9 Months Ended		0 Months Ended		3 Months Ended			0 Months Ended
	Sep. 29, 2012 USD ($)	Sep. 24, 2011 USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) USD ($)		Sep. 29, 2012 Molson Coors Central Europe (MCCE) USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) EUR (€)	Jun. 29, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation, Including Interest and Other Costs [Member] USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation, Including Interest and Other Costs [Member] USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation [Member]	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Senior Debt Facilities [Member] USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) Senior Debt Facilities [Member] EUR (€)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt [Member] USD ($)		Sep. 29, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt [Member] Zero Coupon Senior Unsecured Note [Member]	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)
Business Acquisition, Cost of Acquired Entity, Purchase Price [Abstract]
Business acquisition, Cash consideration			$ 1,816.0
Business acquisition, cost of acquired entity, liabilities incurred			3,400.0				2,700.0					585.0	[1]	500.0	645.9	[2]		500.0
Business acquisition, Gross consideration transferred			3,046.9
Business acquistion, Cash acquired from acquisition			(42.3)	[3]
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Total Liabilities Assumed			1,270.9						423.4	[4]
Total purchase price			3,428.0
Cash Acquired from Acquisition			143.6
Bank Overdrafts Assumed In Acquisition			101.3
Repayments of assumed debt	424.3	0						425.7
Interest expense, SDPO								(1.4)
Debt instrument, interest rate percentage											11.00%						0.00%
Statements of Cash Flow Information, Business Acquisition
Operating activities					1.4	[5]
Investing activities					2,257.4	[6]
Financing activities	105.0	10.8			424.3	[5]
Total cash used					2,683.1
Non-cash					$ 645.9	[7]

[1] According to our agreement with the Seller and in accordance with the terms of the senior debt facility agreement, upon the closing of the Acquisition, we immediately repaid pre-existing StarBev third-party debt including accrued interest.

[2] We issued a €500 million Zero Coupon Senior Unsecured Convertible Note due 2013 to the Seller upon close of the Acquisition. See Note 13, "Debt" for further discussion.

[3] Consists of $143.6 million of cash acquired and $101.3 million of bank overdrafts assumed as part of MCCE's cash pool arrangement and repaid during the third quarter of 2012.

[4] We assumed the pre-existing StarBev $423.4 million SDPO payable to third-party creditors, which we subsequently repaid on June 29, 2012, in accordance with the terms of the SDPO agreement. The SDPO was held by private investors and accrued interest at 11%. The settlement of the SDPO was not required by our agreement with the Seller.

[5] Includes the SDPO discussed above, which was subsequently repaid on June 29, 2012, for $425.7 million including the $1.4 million of interest incurred subsequent to the close of the Acquisition noted as "Operating activities" in the table above.

[6] Includes $1,816.0 million of cash consideration to the Seller for shares acquired and release of StarBev's pre-existing obligations to the Seller. Also, included is $585.0 million of pre-existing third-party debt immediately repaid in accordance with our agreement with the Seller and the terms of the senior debt facility agreement. This amount is presented net of cash acquired of $143.6 million.

[7] Reflects the $645.9 million fair value of the convertible note issued to the Seller upon close of the Acquisition. See Note 13, "Debt" for further discussion.