Acquisition of StarBev - Fair Value of Consideration Transferred (Details)	6 Months Ended			6 Months Ended			0 Months Ended				0 Months Ended
	Jun. 29, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 15, 2012 USD ($)	Jun. 29, 2013 Molson Coors Central Europe (MCCE) USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) EUR (€)	Jun. 29, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation, Including Interest and Other Costs [Member] USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Subordinated Deferred Payment Obligation, Including Interest and Other Costs [Member] USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Senior Debt Facilities [Member] USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Senior Debt Facilities [Member] EUR (€)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt [Member] USD ($)	Jun. 29, 2013 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt [Member] Zero Coupon Senior Unsecured Note [Member]	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible, Unsecured Debt [Member] Zero Coupon Senior Unsecured Note [Member] EUR (€)
Business Acquisition, Cost of Acquired Entity, Purchase Price [Abstract]
Business acquisition, cost of acquired entity, liabilities incurred					$ 3,400,000,000	€ 2,700,000,000			$ 585,000,000	€ 500,000,000			€ 500,000,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Total Liabilities Assumed					1,305,100,000			423,400,000
Repayments of assumed debt	0	424,300,000					425,700,000
Interest expense, SDPO							(1,400,000)
Debt instrument, interest rate percentage												0.00%
Statements of Cash Flow Information, Business Acquisition
Operating activities				1,400,000
Investing activities				2,257,400,000
Financing activities	(2,000,000)	(2,100,000)		(424,300,000)
Total cash used				2,683,100,000
Non-cash				645,900,000							645,900,000
Cash consideration to seller			$ 1,816,000,000