Investments Other Equity Method Investments (Details) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended	3 Months Ended			0 Months Ended	3 Months Ended					3 Months Ended
	Mar. 31, 2014 USD ($)	Mar. 30, 2013 USD ($)	Nov. 05, 2013 Modelo Molson Imports L P MMI [Member] CAD	Mar. 31, 2014 Modelo Molson Imports L P MMI [Member] USD ($)	Mar. 30, 2013 Modelo Molson Imports L P MMI [Member] USD ($)	Dec. 31, 2013 Modelo Molson Imports L P MMI [Member] USD ($)	Nov. 05, 2013 Modelo Molson Imports L P MMI [Member] Subsequent Event [Member]	Mar. 31, 2014 Modelo [Member] USD ($)		Mar. 30, 2013 Modelo [Member] USD ($)		Mar. 31, 2014 Licensing Agreements [Member] USD ($)	Mar. 31, 2014 Canada [Member] Licensing Agreements [Member] USD ($)		Dec. 31, 2013 Canada [Member] Licensing Agreements [Member] USD ($)	Mar. 30, 2013 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%
Joint Venture Agreement, Maturity Term							10 years
Proceeds from Divestiture of Interest in Joint Venture								$ (63.2)	[1]	$ 0	[1]
Gain on early termination of joint venture			70.0
Finite-Lived License Agreements, Gross															40.5
Amortization of Intangible Assets	10.6	11.9											4.9	[1]		0	[1]
Impairment of Intangible Assets, Finite-lived															17.9
Equity Method Investment, Summarized Financial Information, Liabilities and Equity				10.1		21.2
Equity Method Investments, Intercompany Transactions, Net Payables Due				4.5		13.8
Finite-Lived Intangible Assets, Net												34.0			4.9
Income (Loss) from Equity Method Investments	4.2	1.1		0.7	0.6
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party				$ 1.1	$ 2.4

[1] See Note 4, "Investments" for further discussion related to the termination of MMI operations and related intangible asset charge.