Investments Other Equity Method Investments (Details) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended			3 Months Ended					6 Months Ended					3 Months Ended					6 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 29, 2013 USD ($)	Jun. 30, 2014 USD ($)	Jun. 29, 2013 USD ($)	Nov. 05, 2013 Modelo Molson Imports L P MMI [Member] CAD	Jun. 29, 2013 Modelo Molson Imports L P MMI [Member] USD ($)	Jun. 30, 2014 Modelo Molson Imports L P MMI [Member] USD ($)	Jun. 29, 2013 Modelo Molson Imports L P MMI [Member] USD ($)	Dec. 31, 2013 Modelo Molson Imports L P MMI [Member] USD ($)	Jun. 30, 2014 Modelo [Member] USD ($)		Mar. 31, 2014 Modelo [Member] USD ($)	Jun. 29, 2013 Modelo [Member] USD ($)		Jun. 30, 2014 Modelo [Member] USD ($)		Jun. 29, 2013 Modelo [Member] USD ($)		Jun. 30, 2014 Licensing Agreements [Member] USD ($)	Jun. 30, 2014 Canada [Member] Licensing Agreements [Member] USD ($)		Dec. 31, 2013 Canada [Member] Licensing Agreements [Member] USD ($)	Jun. 29, 2013 Canada [Member] Licensing Agreements [Member] USD ($)		Jun. 30, 2014 Canada [Member] Licensing Agreements [Member] USD ($)		Jun. 29, 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										$ 0	[1]	$ (63.2)	$ 0	[1]	$ 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	10.4	11.7	21.0	23.6																0	[1]		0	[1]	4.9	[1]	0	[1]
Impairment of Intangible Assets, Finite-lived																						17.9
Equity Method Investment, Summarized Financial Information, Liabilities and Equity							10.6		21.2
Equity Method Investments, Intercompany Transactions, Net Payables Due							4.7		13.8
Finite-Lived Intangible Assets, Net																			32.0			4.9
Income (Loss) from Equity Method Investments			2.7	7.8		4.5	0.7	5.1
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party						$ 3.3	$ 1.1	$ 5.7

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