Acquisition of StarBev - Fair Value of Consideration Transferred (Details)	12 Months Ended				0 Months Ended			6 Months Ended		0 Months Ended		0 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 29, 2012 USD ($)	Dec. 31, 2014 Senior Debt Facilities Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member]	Jun. 15, 2012 Molson Coors Central Europe (MCCE) USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) EUR (€)	Dec. 29, 2012 Molson Coors Central Europe (MCCE) USD ($)		Jun. 29, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation, Including Interest and Other Costs [Member] USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation [Member]	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Senior Debt Facilities USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)
Business Acquisition, Cost of Acquired Entity, Purchase Price [Abstract]
Cash consideration to Seller					$ 1,816,000,000			$ 2,257,400,000	[1]
Cost of acquired entity, liabilities incurred					3,400,000,000		2,700,000,000					585,000,000	[2]	645,900,000	[3]	500,000,000
Total consideration					3,046,900,000
Cash, net of bank overdraft acquired					(42,300,000)	[4]
Subordinated deferred payment obligation (SDPO) with third-party creditors					423,400,000	[5]
Cash Acquired from Acquisition					143,600,000
Bank Overdrafts Assumed In Acquisition					101,300,000
Debt instrument, interest rate percentage				0.00%							11.00%
Payments on debt assumed in Acquisition	0	0	424,300,000							425,700,000
Interest expense, SDPO	(145,000,000)	(183,800,000)	(196,300,000)							(1,400,000)
Statements of Cash Flow Information, Business Acquisition
Operating activities								1,400,000	[6]
Cash consideration to Seller					1,816,000,000			2,257,400,000	[1]
Financing activities	(74,100,000)	(6,700,000)	105,000,000					424,300,000	[6]
Total cash used								2,683,100,000
Non-cash convertible note issued upon close of the Acquisition	0	0	645,900,000					645,900,000	[7]					645,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net					$ 3,428,000,000

[1] 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.

[2] 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.

[3] 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.

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

[5] 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.

[6] Includes the SDPO discussed above, which was assumed in the Acquisition and 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.

[7] Reflects the $645.9 million fair value of the €500 million Zero Coupon Senior Unsecured Convertible Note issued to the Seller upon close of the Acquisition. See Note 13, "Debt" for further discussion.