Debt Narrative (Details)																					3 Months Ended
	Mar. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)		Mar. 31, 2014 Commercial Paper Program [Member] USD ($)	Dec. 31, 2013 Commercial Paper Program [Member] USD ($)	May 03, 2012 Senior Notes [Member] USD ($)	Jun. 15, 2007 Senior Notes [Member] $575 million 2.5% convertible Senior Notes due 2013 USD ($)	May 03, 2012 Senior Notes [Member] 2.0% Interest Rate, Maturing 2017 [Member] USD ($)	May 03, 2012 Senior Notes [Member] 3.5% Interest Rate, Maturing 2022 [Member] USD ($)	May 03, 2012 Senior Notes [Member] 5.0% Interest Rate, Maturing 2042 [Member] USD ($)	Sep. 22, 2005 Senior Notes [Member] 5.0% Interest Rate, Maturing 2042 [Member]	Mar. 31, 2014 Line of Credit [Member] Revolving Multicurrency Bank Credit Facility [Member] USD ($)	Jun. 30, 2012 Line of Credit [Member] Revolving Multicurrency Bank Credit Facility [Member] USD ($)	Mar. 31, 2014 Revolving Credit [Member] USD ($)	Mar. 31, 2014 Revolving Credit [Member] EUR (€)	Dec. 31, 2013 Revolving Credit [Member] USD ($)	Dec. 31, 2013 Revolving Credit [Member] EUR (€)	Apr. 03, 2012 Revolving Credit [Member] USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	Mar. 30, 2013 Equity conversion feature of debt Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] USD ($)
Debt Instrument [Line Items]
Debt instrument, interest rate percentage									2.00%	3.50%	5.00%	5.00%								0.00%
Debt instrument, face amount							$ 1,900,000,000	$ 575,000,000	$ 300,000,000	$ 500,000,000	$ 1,100,000,000									€ 500,000,000
Long-term debt	(3,177,300,000)		(3,274,800,000)
Unrealized loss, change in fair value of debt convertion feature																					(29,500,000)
Revolving credit facility, maximum borrowing capacity														400,000,000					550,000,000
Line of Credit Facility, Remaining Borrowing Capacity													573,000,000
Commercial paper outstanding, amount					351,100,000	379,800,000
Short-term debt, weighted average interest rate					0.42%	0.49%
Credit facility, current borrowing capacity	0	[1]	0	[1]											123,900,000	90,000,000	137,400,000	100,000,000
Short-term borrowings	615,400,000	[1]	525,100,000	[1]
Long-term debt, fair value	$ 3,355,000,000		$ 3,359,100,000

[1] As of March 31, 2014, and December 31, 2013, the outstanding borrowings under the commercial paper program were $351.1 million and $379.8 million, respectively, with a weighted average effective interest rate and tenor for these outstanding borrowings of 0.42%; 26.6 days and 0.49%; 47.2 days, respectively. We have a revolving credit facility in Europe to provide €150 million on an uncommitted basis through September 2014. As of March 31, 2014, and December 31, 2013, the outstanding borrowings under this revolving credit facility were $123.9 million (€90.0 million) and $137.4 million (€100.0 million), respectively. As of March 31, 2014, and December 31, 2013, there were no outstanding borrowings under our $400 million or $550 million revolving credit facilities which mature in the second quarters of 2015 and 2016, respectively. As of March 31, 2014, we have $573.0 million available to draw on, as the borrowing capacity is reduced by borrowings under our commercial paper program discussed above and our letters of credit in Canada.As of March 31, 2014, and December 31, 2013, we had outstanding borrowings of $3.7 million and $3.1 million, respectively, under the Japanese Yen line of credit and no borrowings under the GBP and CAD facilities. Our Europe segment has a notional cross-border, cross-currency cash pool for the majority of its subsidiaries. As of March 31, 2014, we had $114.1 million in bank overdrafts and $139.2 million in bank cash related to the pool for a net positive position of $25.1 million. As of December 31, 2013, we were not in an overdraft position on a net basis. Also included in short-term borrowings is $22.6 million and $4.8 million related to factoring arrangements and other short-term borrowings within our Europe business as of March 31, 2014, and December 31, 2013, respectively.