Investments Other Equity Investments (Details)	12 Months Ended				0 Months Ended	12 Months Ended			0 Months Ended		12 Months Ended	0 Months Ended		12 Months Ended			0 Months Ended			12 Months Ended							1 Months Ended	3 Months Ended		1 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 29, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Grolsch	Nov. 05, 2013 Modelo	Dec. 31, 2013 Modelo USD ($)	Dec. 29, 2012 Modelo USD ($)	Dec. 31, 2011 Modelo USD ($)	Nov. 05, 2013 Modelo Subsequent Event CAD	Dec. 31, 2013 Modelo Affiliate USD ($)	Dec. 31, 2013 ABI	Dec. 29, 2013 Tradeteam Ltd USD ($)	Dec. 23, 2013 Tradeteam Ltd USD ($)	Dec. 31, 2013 Tradeteam Ltd USD ($)	Dec. 29, 2012 Tradeteam Ltd USD ($)	Dec. 31, 2011 Tradeteam Ltd USD ($)	Dec. 29, 2013 Tradeteam Ltd Prepayment received for future benefits USD ($)	Dec. 29, 2013 Tradeteam Ltd Determination of loss on sale of investment USD ($)	Dec. 23, 2013 Tradeteam Ltd Distribution Agreement	Dec. 31, 2013 BRI USD ($)	Dec. 29, 2012 BRI USD ($)	Dec. 31, 2011 BRI USD ($)	Dec. 31, 2013 BDL USD ($) members	Dec. 29, 2012 BDL USD ($)	Dec. 31, 2011 BDL USD ($)	Dec. 31, 2013 Modelo Molson Imports LP (MMI)	Dec. 31, 2013 MC Si Hai USD ($)	Sep. 30, 2012 MC Si Hai USD ($)	Jun. 30, 2012 MC Si Hai USD ($)	Dec. 31, 2013 MC Si Hai Deconsolidation liability USD ($)	Dec. 31, 2013 MC Si Hai Proceeds from sale USD ($)
Schedule of Equity Method Investments [Line Items]
Early termination payment upon exit of joint venture	$ 0	$ 0	$ (83,200,000)										$ 40,000,000
Estimated useful life																			10 years
Investment in joint venture	2,506,500,000	2,431,800,000				21,200,000									17,700,000					(13,600,000)	41,900,000		15,400,000	8,400,000
Purchase accounting historical costs corrections		400,000
Administrative fees related to agreements																				118,100,000	124,300,000	99,500,000	59,600,000	61,900,000	41,600,000
Administrative fees receivable related to agreements																				29,100,000	37,900,000		(3,500,000)	9,100,000
Number of members in distribution operation																							2
Voting control percentage shared by members (as a percent)						50.00%					50.00%												50.00%			50.00%
Joint venture agreement, term					10 years
Proceeds from divestiture of joint venture interest									70,000,000			29,500,000					19,800,000	9,700,000
Loss on disposal on joint venture																											6,000,000			5,400,000	600,000
Restructuring, Settlement and Impairment Provisions	200,000,000	81,400,000	12,300,000
Legal and other fees related to disposal of joint venture																											1,200,000
Net payable owed to joint venture										13,800,000				18,500,000	14,600,000
Definite-lived intangible asset, carrying value						5,400,000
Equity earnings from joint venture interest	19,100,000	15,700,000	23,200,000			11,700,000	12,000,000	15,400,000						4,600,000	6,000,000	6,400,000
Marketing and administrative cost recoveries						11,300,000	12,500,000	11,300,000
Joint venture, ownership percentage				49.00%										49.90%
Service costs incurred under joint venture														126,900,000	128,500,000	130,700,000
Loss on goodwill impairment	0	0																											9,500,000
Loss on impairment of intangible assets																													900,000
Asset impairment charges																												$ 27,600,000	$ 10,400,000