Debt Table (Details)																																				3 Months Ended	12 Months Ended	0 Months Ended			3 Months Ended		1 Months Ended							3 Months Ended
	Mar. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)		Mar. 31, 2014 Japanese Yen [Member] USD ($)	Dec. 31, 2013 Japanese Yen [Member] USD ($)	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 ($)	May 03, 2012 Senior Notes [Member] USD ($)	Jun. 15, 2007 Senior Notes [Member] $575 million 2.5% convertible Senior Notes due 2013 USD ($)	Mar. 31, 2014 Senior Notes [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)		Dec. 31, 2013 Senior Notes [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)		Mar. 31, 2014 Senior Notes [Member] Canadian dollar ("CAD") 900 million 5.0% notes due 2015 USD ($)	Dec. 31, 2013 Senior Notes [Member] Canadian dollar ("CAD") 900 million 5.0% notes due 2015 USD ($)	Sep. 22, 2005 Senior Notes [Member] Canadian dollar ("CAD") 900 million 5.0% notes due 2015 USD ($)	Mar. 31, 2014 Senior Notes [Member] CAD 500 million 3.95% Series A notes due 2017 USD ($)	Dec. 31, 2013 Senior Notes [Member] CAD 500 million 3.95% Series A notes due 2017 USD ($)	Oct. 06, 2010 Senior Notes [Member] CAD 500 million 3.95% Series A notes due 2017 USD ($)	Mar. 31, 2014 Senior Notes [Member] $300 million 2.0% notes due 2017 USD ($)	Dec. 31, 2013 Senior Notes [Member] $300 million 2.0% notes due 2017 USD ($)	Mar. 31, 2014 Senior Notes [Member] $500 million 3.5% notes due 2022 USD ($)	Dec. 31, 2013 Senior Notes [Member] $500 million 3.5% notes due 2022 USD ($)	Mar. 31, 2014 Senior Notes [Member] $1.1 billion 5.0% notes due 2042 USD ($)	Dec. 31, 2013 Senior Notes [Member] $1.1 billion 5.0% notes due 2042 USD ($)	May 03, 2012 Senior Notes [Member] 5.0% Interest Rate, Maturing 2042 [Member] USD ($)	Sep. 22, 2005 Senior Notes [Member] 5.0% Interest Rate, Maturing 2042 [Member]	May 03, 2012 Senior Notes [Member] 2.0% Interest Rate, Maturing 2017 [Member] USD ($)	May 03, 2012 Senior Notes [Member] 3.5% Interest Rate, Maturing 2022 [Member] USD ($)	Mar. 31, 2014 Commercial Paper Program [Member] USD ($)	Dec. 31, 2013 Commercial Paper Program [Member] USD ($)	Sep. 03, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)	Sep. 03, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)	Aug. 13, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)	Mar. 31, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)	Mar. 31, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)	Apr. 30, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] Subsequent Event [Member] USD ($)	Mar. 31, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] USD ($)	Mar. 31, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	Dec. 31, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] USD ($)	Dec. 31, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	Aug. 13, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	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 ($)	Mar. 31, 2014 Central Europe [Member] USD ($)	Mar. 31, 2014 Central Europe [Member] Line of Credit [Member] EUR (€)	Mar. 31, 2014 Central Europe [Member] Factoring arrangement [Member] USD ($)	Dec. 31, 2013 Central Europe [Member] Factoring arrangement [Member] USD ($)
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Amount																																						$ 614,700,000	€ 466,000,000
Unrealized Gain (Loss) on Derivatives																																																		(29,500,000)
Total long-term debt (including current portion) before unamortized discounts and other																15,000,000	[1]	61,800,000	[1]	814,500,000	847,200,000		452,500,000	470,700,000		300,000,000	300,000,000	500,000,000	500,000,000	1,100,000,000	1,100,000,000																	510,900,000
Other long-term debt	100,000		200,000
Commercial Paper Outstanding, Amount																																				351,100,000	379,800,000
Short-term debt, weighted average interest rate																																				0.42%	0.49%
Weighted average interest rate, term																																				638 hours	1133 hours
Credit facilities	0	[2]	0	[2]	3,700,000	3,100,000			123,900,000	90,000,000	137,400,000	100,000,000
Less: unamortized debt discounts and other	(4,800,000)		(5,100,000)
Total long-term debt (including current portion)	3,177,300,000		3,274,800,000
Current portion of long-term debt	(15,000,000)		(61,800,000)																																									(15,000,000)	(10,900,000)	(61,800,000)	(44,900,000)
Total long-term debt	3,162,300,000		3,213,000,000
Short-term debt	615,400,000	[2]	525,100,000	[2]
Current portion of long-term debt and short-term borrowings	630,400,000		586,900,000
Debt instrument, face amount														1,900,000,000	575,000,000							900,000,000			500,000,000							1,100,000,000		300,000,000	500,000,000														500,000,000
Debt instrument, interest rate percentage																									3.95%							5.00%	5.00%	2.00%	3.50%														0.00%
Business Combination, Payment of Claim Settlement																																									46,300,000	34,000,000	15,100,000
Debt Instrument, Convertible, Beneficial Conversion Feature																																						14,400,000		10,900,000
Long-term Debt - Portion of Principal Repayment																																						600,300,000	455,100,000
Line of Credit Facility, Maximum Borrowing Capacity								400,000,000					550,000,000																																							150,000,000
Line of Credit Facility, Remaining Borrowing Capacity							573,000,000
Bank overdrafts																																																			114,100,000
Bank cash																																																			139,200,000
Bank cash, net of overdrafts																																																			25,100,000
Other Short-term Borrowings																																																					$ 22,600,000	$ 4,800,000

[1] On June 15, 2012, we issued a €500 million convertible note due December 31, 2013, which included a put conversion feature to the Seller. On August 13, 2013, the conversion feature was exercised for an agreed-upon value upon exercise of €510.9 million, consisting of €500 million in principal and €10.9 million for the conversion feature. On September 3, 2013, we paid the Seller in cash a total of €466.0 million ($614.7 million) consisting of €455.1 million ($600.3 million) in principal and €10.9 million ($14.4 million) for the conversion feature. Separate from the Seller's notice to put, we had made claims with regard to the representations and warranties provided to us upon close of the Acquisition related to local country regulatory matters associated with pre-acquisition periods. As of December 31, 2013, we had withheld €44.9 million ($61.8 million) from the €500 million in principal related to these outstanding claims. During the first quarter of 2014, we released €34.0 million ($46.3 million at settlement) of the amount withheld to the Seller as a result of the settlement of one of these claims. As of March 31, 2014, the remaining amount withheld was €10.9 million ($15.0 million), which we subsequently released in April 2014 for a final principal payment of €10.9 million ($15.1 million at settlement). We did not incur any interest on amounts withheld. The €500 million convertible note's embedded conversion feature was determined to meet the definition of a derivative required to be bifurcated and separately accounted for at fair value with changes in fair value recorded in earnings. During the first quarter of 2013, we recognized an unrealized loss of $29.5 million on the conversion feature based on the fair value movements during the quarter. The cash and non-cash interest, excluding the change in fair value of the convertible feature, resulted in an immaterial impact to our effective interest rate for the first quarter of 2013.

[2] 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.