Other Income and Expense Footnotes (Details) (USD $)	12 Months Ended						0 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2011 MillerCoors	May 03, 2012 Senior Notes	Oct. 06, 2010 Senior Notes	Nov. 08, 2013 Gain on sale of non-operating asset	Mar. 30, 2013 Gain on sale of non-operating asset	Nov. 08, 2013 Gain on sale of non-operating asset Molson Coors Brewing Company (MCBC)	Dec. 31, 2013 Loss from foreign exchange and derivatives Molson Coors Central Europe (MCCE)	Dec. 29, 2012 Loss from foreign exchange and derivatives Molson Coors Central Europe (MCCE)	Dec. 31, 2011 Loss from foreign exchange and derivatives Molson Coors Central Europe (MCCE)	Dec. 31, 2013 Foreign cash positions and foreign exchange contracts Molson Coors Central Europe (MCCE)	Dec. 29, 2012 Sale of water rights
Related Party Transaction [Line Items]
Ownership percentage by noncontrolling owners									14.60%
Gain on sale of noncontrolling interest							$ 22,300,000
Gain for proceeds received related to non-income-related tax settlement								1,200,000
Face amount of senior notes					1,900,000,000	500,000,000
Loss on foreign currency movements										(2,400,000)	(23,800,000)
Loss on other foreign exchange and derivative activity	(8,400,000)	(38,000,000)	(9,100,000)							(500,000)	(1,400,000)	(6,900,000)	(4,900,000)
Other nonoperating income														5,200,000
Gain on sale of non-core real estate to related parties				$ 1,000,000