Other Income and Expense (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 28, 2013	Sep. 30, 2014	Sep. 28, 2013	Sep. 30, 2014 Sale of Non-operating Asset [Member]	Sep. 28, 2013 Sale of Non-operating Asset [Member]	Sep. 30, 2014 Sale of Non-operating Asset [Member]	Sep. 28, 2013 Sale of Non-operating Asset [Member]	Sep. 30, 2014 Other Foreign Exchange and Derivative Activity [Member]		Sep. 28, 2013 Other Foreign Exchange and Derivative Activity [Member]		Sep. 30, 2014 Other Foreign Exchange and Derivative Activity [Member]		Sep. 28, 2013 Other Foreign Exchange and Derivative Activity [Member]		Sep. 30, 2014 Other income (expense), net [Member]	Sep. 28, 2013 Other income (expense), net [Member]	Sep. 30, 2014 Other income (expense), net [Member]	Sep. 28, 2013 Other income (expense), net [Member]	Sep. 28, 2013 Molson Coors Central Europe (MCCE) [Member] Other Foreign Exchange and Derivative Activity [Member]	Sep. 30, 2014 Molson Coors Central Europe (MCCE) [Member] Other Foreign Exchange and Derivative Activity [Member]	Sep. 28, 2013 Molson Coors Central Europe (MCCE) [Member] Other Foreign Exchange and Derivative Activity [Member]	May 03, 2012 Senior Notes [Member]	Sep. 28, 2013 StarBev L.P. [Member] Foreign Cash Positions and Foreign Exchange Contracts [Member]	Sep. 28, 2013 StarBev L.P. [Member] Foreign Cash Positions and Foreign Exchange Contracts [Member]
Other income and expense:
Debt instrument, face amount																								$ 1,900,000,000
Other income (expense), net	(5,000,000)	(5,500,000)	(3,500,000)	(8,500,000)	0	0	0	1,200,000	(4,000,000)	[1]	(5,300,000)	[1]	(2,700,000)	[1]	(11,400,000)	[1]	(1,000,000)	(200,000)	(800,000)	1,700,000
Loss on foreign currency movements																					(11,400,000)	500,000	(1,400,000)
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments																									$ 1,800,000	$ (4,900,000)

[1] Included in this amount are gains of $0.5 million for the nine months ended September 30, 2014, and unrealized losses of $11.4 million and $1.4 million for the three and nine months ended September 28, 2013, respectively, related to foreign currency movements on foreign-denominated financing instruments entered into in conjunction with the closing of the Acquisition. We also recorded unrealized gains of $1.8 million and losses of $4.9 million for the three and nine months ended September 28, 2013, respectively, related to foreign cash positions and foreign exchange contracts entered into to hedge our risk associated with payments of this foreign-denominated debt.