Investments Other Equity Investments (Details)	12 Months Ended				0 Months Ended	12 Months Ended				12 Months Ended	0 Months Ended		12 Months Ended		0 Months Ended			12 Months Ended						0 Months Ended	12 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 29, 2012 USD ($)	Dec. 31, 2014 Grolsch	Nov. 05, 2013 Modelo	Dec. 31, 2014 Modelo USD ($)	Dec. 31, 2013 Modelo USD ($)	Dec. 29, 2012 Modelo USD ($)	Dec. 31, 2013 Modelo Affiliate USD ($)	Dec. 31, 2014 ABI	Dec. 29, 2013 Tradeteam Ltd USD ($)	Dec. 23, 2013 Tradeteam Ltd USD ($)	Dec. 31, 2013 Tradeteam Ltd USD ($)	Dec. 29, 2012 Tradeteam Ltd USD ($)	Dec. 29, 2013 Tradeteam Ltd Prepayment received for future benefits USD ($)	Dec. 29, 2013 Tradeteam Ltd Determination of loss on sale of investment USD ($)	Dec. 23, 2013 Tradeteam Ltd Distribution Agreement	Dec. 31, 2014 BRI USD ($)	Dec. 31, 2013 BRI USD ($)	Dec. 29, 2012 BRI USD ($)	Dec. 31, 2014 BDL USD ($) members	Dec. 31, 2013 BDL USD ($)	Dec. 29, 2012 BDL USD ($)	Nov. 05, 2013 Modelo Molson Imports LP (MMI) CAD	Dec. 31, 2014 Modelo Molson Imports LP (MMI)	Mar. 31, 2014 Modelo USD ($)	Dec. 31, 2013 MC Si Hai USD ($)	Sep. 30, 2012 MC Si Hai USD ($)	Jun. 30, 2012 MC Si Hai USD ($)	Dec. 31, 2013 MC Si Hai Deconsolidation liability USD ($)	Sep. 29, 2012 MC Si Hai Deconsolidation liability USD ($)	Dec. 31, 2013 MC Si Hai Proceeds from sale USD ($)	Dec. 31, 2013 Tradeteam Ltd Termination fees and other (gains)/losses USD ($)
Schedule of Equity Method Investments [Line Items]
Early termination payment upon exit of joint venture												$ 40,000,000
Estimated useful life																	10 years
Investment in joint venture	2,388,600,000	2,506,500,000					21,200,000											21,700,000	(13,600,000)		13,700,000	15,400,000
Adjustment due to change in historical accounting	0	8,100,000
Administrative fees related to agreements																		103,400,000	118,100,000	124,300,000	50,800,000	59,600,000	61,900,000
Administrative fees receivable related to agreements																		27,600,000	29,100,000		(2,200,000)	(3,500,000)
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						63,200,000					29,500,000				19,800,000	9,700,000
Loss on disposal on joint venture																											6,000,000			5,400,000	5,400,000	600,000
Total special items	324,400,000	200,000,000	81,400,000																														13,200,000	[1]
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
Equity earnings from joint venture interest	(1,700,000)	19,100,000	15,700,000			700,000	11,700,000	12,000,000					4,600,000	6,000,000
Marketing and administrative cost recoveries						1,100,000	11,300,000	12,500,000
Joint venture, ownership percentage				49.00%									49.90%
Service costs incurred under joint venture													126,900,000	128,500,000
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
Gain (Loss) on Contract Termination																								70,000,000
Amortization of the difference between MCBC contributed cost basis and proportionate share of the underlying equity in net assets of MillerCoors																										$ 4,900,000

[1] Upon termination of our Tradeteam distribution agreements and subsequent termination of the joint venture and sale of our 49.9% interest in Tradeteam to DHL, we recognized a loss of $13.2 million in December 2013. See Note 5, "Investments" for further discussion.