Debt Table (Details)	3 Months Ended							3 Months Ended																												6 Months Ended						6 Months Ended	12 Months Ended	0 Months Ended			6 Months Ended						3 Months Ended	6 Months Ended
	Jun. 30, 2014 USD ($)		Dec. 31, 2013 USD ($)		Jun. 30, 2014 Japanese Yen [Member] USD ($)	Dec. 31, 2013 Japanese Yen [Member] USD ($)	Jun. 30, 2014 Letters of credit [Member] USD ($)	Jun. 30, 2014 Revolving credit facility [Member] USD ($)	Jul. 01, 2014 Interest rate swaps [Member] USD ($)	Jun. 30, 2014 Interest rate swaps [Member] USD ($)	Jun. 30, 2014 Line of Credit [Member] Revolving Multicurrency Bank Credit Facility [Member] USD ($)	Jun. 30, 2012 Line of Credit [Member] Revolving Multicurrency Bank Credit Facility [Member] USD ($)	Jun. 30, 2014 Revolving Credit [Member] USD ($)	Dec. 31, 2013 Revolving Credit [Member] USD ($)	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] $575 million 2.5% convertible Senior Notes due 2013 USD ($)	Jun. 30, 2014 Senior Notes [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)		Dec. 31, 2013 Senior Notes [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)		Jun. 30, 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 ($)	Jun. 30, 2014 Senior Notes [Member] CAD 500 million 3.95% Series A notes due 2017 USD ($)	Dec. 31, 2013 Senior Notes [Member] CAD 500 million 3.95% Series A notes due 2017 USD ($)	Oct. 06, 2010 Senior Notes [Member] CAD 500 million 3.95% Series A notes due 2017 USD ($)	Jun. 30, 2014 Senior Notes [Member] $300 million 2.0% notes due 2017 USD ($)	Dec. 31, 2013 Senior Notes [Member] $300 million 2.0% notes due 2017 USD ($)	Jun. 30, 2014 Senior Notes [Member] $500 million 3.5% notes due 2022 [Member] USD ($)		Dec. 31, 2013 Senior Notes [Member] $500 million 3.5% notes due 2022 [Member] USD ($)		May 03, 2012 Senior Notes [Member] $500 million 3.5% notes due 2022 [Member] USD ($)	Jun. 30, 2014 Senior Notes [Member] $500 million 3.5% notes due 2022 [Member] Interest rate swaps [Member] USD ($)	Jun. 30, 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 ($)	Sep. 22, 2005 Senior Notes [Member] 5.0% Interest Rate, Maturing 2042 [Member]	May 03, 2012 Senior Notes [Member] 2.0% Interest Rate, Maturing 2017 [Member] USD ($)	Jun. 30, 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 ($)	Sep. 03, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)	Aug. 13, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)	Jun. 30, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] USD ($)	Jun. 30, 2014 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] EUR (€)	Dec. 31, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] USD ($)	Dec. 31, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	Aug. 13, 2013 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)	Jun. 30, 2013 Equity conversion feature of debt Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] USD ($)	Jun. 30, 2013 Equity conversion feature of debt Molson Coors Central Europe (MCCE) Convertible Debt [Member] Zero Coupon Senior Unsecured Note [Member] USD ($)	Jun. 30, 2014 Central Europe [Member] USD ($)	Jun. 30, 2014 Central Europe [Member] Line of Credit [Member] EUR (€)	Jun. 30, 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																																																					2,700,000	(26,800,000)
Total long-term debt (including current portion) before unamortized discounts and other																			0	[1]	61,800,000	[1]	843,400,000	847,200,000		468,600,000	470,700,000		300,000,000	300,000,000	501,200,000	[2]	500,000,000	[2]	500,000,000		1,100,000,000	1,100,000,000													510,900,000
Loss on interest rate swaps, change in carrying value																																				(1,200,000)
Derivative, notional amount									200,000,000	300,000,000
Other long-term debt	100,000		200,000
Commercial Paper Outstanding, Amount																																										301,100,000	379,800,000
Short-term debt, weighted average interest rate																																										0.38%	0.49%
Weighted average interest rate, term																																										710 hours	1133 hours
Credit facilities	0	[3]	0	[3]	4,400,000	3,100,000							0	137,400,000	100,000,000
Line of credit facility, term	5 years
Less: unamortized debt discounts and other	(4,700,000)		(5,100,000)
Total long-term debt (including current portion)	3,208,600,000		3,274,800,000
Current portion of long-term debt	0		(61,800,000)																																														(61,800,000)	(44,900,000)
Total long-term debt	3,208,600,000		3,213,000,000
Short-term debt	451,600,000	[3]	525,100,000	[3]
Current portion of long-term debt and short-term borrowings	451,600,000		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
Debt instrument, interest rate percentage																												3.95%							3.50%				5.00%	5.00%	2.00%											0.00%
Business Combination, Payment of Claim Settlement																																															61,400,000	44,900,000
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	750,000,000						100,000,000					400,000,000				550,000,000																																								150,000,000
Accelerated amortization of debt issuance costs								1,300,000
Debt issuance costs								1,800,000
Line of Credit Facility, Remaining Borrowing Capacity											448,900,000
Bank overdrafts																																																							134,200,000
Bank cash																																																							166,900,000
Bank cash, net of overdrafts																																																							32,700,000
Other Short-term Borrowings																																																									$ 11,900,000	$ 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 half of 2014, we released the €44.9 million ($61.4 million at settlement) withheld to the Seller as a result of the settlement of these claims. 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 three and six months ended June 29, 2013, we recognized an unrealized gain of $2.7 million and an unrealized loss of $26.8 million, respectively, related to changes in the fair value of the conversion feature. 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 three and six months ended June 29, 2013.

[2] In the second quarter of 2014, we entered into interest rate swaps to economically convert a portion of our fixed rate $500 million 3.5% notes due 2022 ("$500 million notes") to floating rate debt. This resulted in an effective interest rate of 3.31% and 3.40%, for the three and six months ended June 30, 2014, respectively. As a result of this hedge program, the carrying value of the $500 million note includes a $1.2 million adjustment for fair value movements attributable to the benchmark interest rate. See Note 13, "Derivative Instruments and Hedging Activities" for further details.

[3] As of June 30, 2014, and December 31, 2013, the outstanding borrowings under the commercial paper program were $301.1 million and $379.8 million, respectively, with a weighted average effective interest rate and tenor for these outstanding borrowings of 0.38%; 29.6 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 June 30, 2014, there were no outstanding borrowings under this revolving credit facility and as of December 31, 2013, the outstanding borrowings under this revolving credit facility were $137.4 million (€100.0 million). During the second quarter of 2014, we entered into a five-year, $750 million revolving multi-currency credit facility, which provides a $100 million sub-facility available for the issuance of letters of credit. This $750 million revolving facility replaced our existing $400 million and $550 million revolving credit facilities, which had maturities in the second quarters of 2015 and 2016, respectively. As a result, we made a reduction to the size of our existing commercial paper program to a maximum aggregate amount outstanding at any time of $750 million. Concurrent with the transaction, we incurred $1.8 million of issuance costs related to the $750 million revolving credit facility which are being amortized over the term of the agreement and recognized $1.3 million of accelerated amortization related to the termination of the pre-existing facilities. There were no outstanding borrowings under our $750 million revolving credit facility as of June 30, 2014, or under our pre-existing credit facilities upon termination or as of December 31, 2013. As of June 30, 2014, we have $448.9 million available to draw on under our $750 million revolving credit facility, as the borrowing capacity is reduced by borrowings under our commercial paper program discussed above. As of June 30, 2014, and December 31, 2013, we had outstanding borrowings of $4.4 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 June 30, 2014, we had $134.2 million in bank overdrafts and $166.9 million in bank cash related to the pool for a net positive position of $32.7 million. As of December 31, 2013, we did not have bank overdrafts related to the cash pool. Also included in short-term borrowings is $11.9 million and $4.8 million related to factoring arrangements and other short-term borrowings within our Europe business as of June 30, 2014, and December 31, 2013, respectively.