Acquisition of StarBev - Allocation of Consideration Transferred (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 29, 2012	Jun. 29, 2012	Dec. 31, 2013	Jun. 15, 2012
Business Acquisition [Line Items]
Purchase price adjustment		$ (15.4)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	2,191.6	2,418.7	2,453.1		2,418.7
Payments on debt assumed in Acquisition	0	0	424.3
Molson Coors Central Europe (MCCE)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents						143.6
Current assets						263.5	[1]
Properties						571.7
Other intangibles, net						2,481.0	[2]
Other assets						36.7
Total assets acquired						3,496.5
Current liabilities						849.0	[3]
Non-current liabilities						456.1	[4]
Total liabilities assumed						1,305.1
Total identifiable net assets						2,191.4
Noncontrolling interest measured at fair value						40.6
Goodwill						896.1	[5]
Total consideration						3,046.9
Business acquisition, assets assumed, net receivables						167.5
Business acquisition, assets assumed, inventory						57.3
Deferred tax liabilities						404.0
Molson Coors Central Europe (MCCE) | Subordinated Deferred Payment Obligation, Including Interest and Other Costs [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Current liabilities						423.4
Payments on debt assumed in Acquisition				425.7
Europe | Brand Impairment [Member]
Business Acquisition [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	360.0	150.9			150.9
Brands
Business Acquisition [Line Items]
Finite-lived Intangible Assets, Fair Value Disclosure						145.6
Useful life	30 years
Land Use Rights And Other [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets, Fair Value Disclosure						$ 12.0
Useful life	1 year 6 months

[1] Includes trade receivables of $167.5 million and inventory of $57.3 million.

[2] Includes the fair values of $145.6 million for brand intangibles with a 30 year useful life, $2,323.4 million for brand intangibles with an indefinite-life and a fair value of a favorable supply contract and other intangibles of $12.0 million with a 1.5 year useful life. See Note 12, "Goodwill and Intangible Assets" for further discussion of changes to intangible assets resulting from our annual goodwill and indefinite-lived intangible testing in 2014 and 2013.

[3] Includes the $423.4 million SDPO assumed, which was subsequently repaid for $425.7 million on June 29, 2012.

[4] Includes $404.0 million of deferred tax liabilities.

[5] The goodwill resulting from the Acquisition is primarily attributable to Central Europe's licensed brand brewing, distribution and import business, anticipated synergies and the assembled workforce. We assigned the majority of the goodwill to our Europe reporting unit with a portion allocated to the Canada reporting unit resulting from synergies. The goodwill is not deductible for local tax purposes. See Note 12, "Goodwill and Intangible Assets" for further discussion.