Derivative Instruments and Hedging Activities Narrative (Details)	12 Months Ended					3 Months Ended					12 Months Ended						12 Months Ended			0 Months Ended	1 Months Ended								48 Months Ended				12 Months Ended	0 Months Ended										0 Months Ended
	Dec. 29, 2012 USD ($)	Dec. 31, 2013 Foreign Exchange Forward [Member]	Dec. 31, 2013 Natural Gas [Member]	Dec. 31, 2013 Aluminum [Member]	Dec. 31, 2013 Corn [Member]	Sep. 30, 2010 Forward Contracts [Member] CAD	Sep. 25, 2005 Forward Contracts [Member] CAD	Oct. 06, 2010 Forward Contracts [Member] CAD	Sep. 25, 2010 Forward Contracts [Member]	Sep. 22, 2005 Forward Contracts [Member] CAD	Dec. 31, 2013 Diesel	Dec. 31, 2013 Net Investment Hedges USD ($)	Dec. 29, 2012 Net Investment Hedges USD ($)	Dec. 31, 2011 Net Investment Hedges USD ($)	Dec. 31, 2013 Net Investment Hedges Cross currency swaps USD ($)	Apr. 10, 2007 Net Investment Hedges Cross currency swaps CAD	Dec. 31, 2013 Cash Flow Hedges USD ($)	Dec. 29, 2012 Cash Flow Hedges USD ($)	Dec. 31, 2011 Cash Flow Hedges USD ($)	Jan. 03, 2014 Cash Flow Hedges Cross currency swaps USD ($)	Sep. 30, 2011 Cash Flow Hedges Cross currency swaps USD ($)	Jan. 03, 2014 Cash Flow Hedges Cross currency swaps CAD	Dec. 31, 2013 Cash Flow Hedges Cross currency swaps USD ($)	Mar. 31, 2012 Cash Flow Hedges Cross currency swaps USD ($)	Sep. 30, 2011 Cash Flow Hedges Cross currency swaps GBP (£)	Apr. 10, 2007 Cash Flow Hedges Cross currency swaps USD ($)	Apr. 10, 2007 Cash Flow Hedges Cross currency swaps CAD	Apr. 10, 2007 Cash Flow Hedges Cross currency swaps GBP (£)	Apr. 03, 2016 Term Loan Agreement	Apr. 03, 2012 Term Loan Agreement USD ($)	May 03, 2012 Senior Notes USD ($)	Oct. 06, 2010 Senior Notes USD ($)	Dec. 29, 2012 Treasury Lock Loss Interest Rate Contract USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) USD ($)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) EUR (€)	Jun. 15, 2012 Molson Coors Central Europe (MCCE) Convertible Debt USD ($)		Jun. 15, 2012 Molson Coors Central Europe (MCCE) Senior Notes USD ($)		Dec. 31, 2013 Fair value, level 3 inputs USD ($)	Dec. 29, 2012 Fair value, level 3 inputs USD ($)	Dec. 31, 2011 Fair value, level 3 inputs USD ($)	Dec. 31, 2013 Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] Senior Notes	May 03, 2012 Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] Treasury Lock Loss Interest Rate Contract	Jun. 15, 2012 Convertible Senior Unsecured Note Due 2013 €500 Million 0.0% [Member] Molson Coors Central Europe (MCCE) Convertible Debt EUR (€)	Apr. 03, 2012 Tranch 2 Term Loan Agreement USD ($)	Apr. 03, 2012 Tranch 2 Term Loan Agreement EUR (€)
Schedule of Trading Securities and Other Trading Assets
Business acquisition, cost of acquired entity, liabilities incurred																																		$ 3,400,000,000	€ 2,700,000,000	$ 645,900,000	[1]	$ 585,000,000	[2]						€ 500,000,000
Debt instrument, face amount								500,000,000		900,000,000																				300,000,000	1,900,000,000	500,000,000														150,000,000	120,000,000
Business acquisition, pro forma adjustments																																	39,200,000
Convertible debt, shares issued upon conversion																																												12,894,044
Derivative liabilities																																								0	(7,900,000)	0
Debt instrument, term																													4 years
Notional amount of derivative, not designated as hedging instrument																						241,000,000				774,000,000	1,200,000,000	530,000,000
Payment to settle derivative instrument																				65,200,000
Maximum term, commodity swap contract hedge		60 months	48 months	60 months	60 months						24 months
Derivatives Percentage Of Derivatives Settled																					25.00%
Loss from cash flow hedges reclassified from AOCI to earnings	6,700,000											0	0	0			5,500,000	(10,200,000)	(14,900,000)
Derivative Liability Outstanding Amount Exstinguished															113,900,000	361,000,000					98,700,000			110,600,000
Cash Flow Hedge Loss Reclassified to Other Income																					900,000
Swap transaction, principal paid																									132,400,000.0
Derivative Liability, Fair Value, Net																							(71,700,000)
Debt instrument, interest rate percentage																																											0.00%
Derivative, Loss on Derivative						7,800,000	4,000,000
Debt Instrument Increase in Effective Cost of Borrowing Expressed as Basis Points over Stated Coupon, Rate									0.23%	0.05%
Cash flow hedge loss expected to be reclassified from AOCI to income within twelve months																	$ 11,300,000
Maximum length of time over which forecasted transactions are hedged																	3 years 7 months

[1] We issued a €500 million Zero Coupon Senior Unsecured Convertible Note due 2013 to the Seller upon close of the Acquisition. See Note 13, "Debt" for further discussion.

[2] According to our agreement with the Seller and in accordance with the terms of the senior debt facility agreement, upon the closing of the Acquisition, we immediately repaid pre-existing StarBev third-party debt including accrued interest.