Investments Other Equity Method Investments (Details) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended	3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Nov. 05, 2013 Modelo Molson Imports L P MMI [Member] CAD	Mar. 31, 2014 Modelo Molson Imports L P MMI [Member] USD ($)	Mar. 31, 2015 Modelo [Member] USD ($)		Mar. 31, 2014 Modelo [Member] USD ($)		Mar. 31, 2015 Canada [Member] Licensing Agreements [Member] USD ($)		Mar. 31, 2014 Canada [Member] Licensing Agreements [Member] USD ($)
Schedule of Equity Method Investments [Line Items]
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions				50.00%			50.00%
Termination fee income					$ 0	[1]	$ (63.2)	[1]
Gain on early termination of joint venture			70.0
Amortization of Intangible Assets	7.8	15.5							0	[1]	4.9	[1]
Impairment of Intangible Assets, Finite-lived									8.9
Finite-Lived Intangible Assets, Net											4.9
Income (Loss) from Equity Method Investments	1.4	4.2		0.7
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party				$ 1.1

[1] Upon termination of our MMI operations in the first quarter of 2014, we recognized termination fee income and charges associated with the write-off of the definite-lived intangible asset associated with the joint venture. See Note 4, "Investments" for further discussion.