Other Income and Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended		3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended		3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Jun. 30, 2007	Sep. 28, 2013 Other Foreign Exchange and Derivative Activity [Member]	Sep. 28, 2013 Other Foreign Exchange and Derivative Activity [Member]	Sep. 29, 2012 Other Foreign Exchange and Derivative Activity [Member]	Sep. 28, 2013 Bridge Facility Fees [Member]		Sep. 29, 2012 Bridge Facility Fees [Member]		Sep. 28, 2013 Bridge Facility Fees [Member]		Sep. 29, 2012 Bridge Facility Fees [Member]		Sep. 28, 2013 Euro Currency Purchase Loss [Member]		Sep. 29, 2012 Euro Currency Purchase Loss [Member]		Sep. 28, 2013 Euro Currency Purchase Loss [Member]		Sep. 29, 2012 Euro Currency Purchase Loss [Member]		Sep. 28, 2013 Sale of Non-operating Asset [Member]		Sep. 29, 2012 Sale of Non-operating Asset [Member]		Sep. 28, 2013 Sale of Non-operating Asset [Member]	Sep. 29, 2012 Sale of Non-operating Asset [Member]	Sep. 28, 2013 Other Foreign Exchange and Derivative Activity [Member]		Sep. 29, 2012 Other Foreign Exchange and Derivative Activity [Member]		Sep. 28, 2013 Other Foreign Exchange and Derivative Activity [Member]		Sep. 29, 2012 Other Foreign Exchange and Derivative Activity [Member]		Sep. 28, 2013 Other, net	Sep. 29, 2012 Other, net	Sep. 28, 2013 Other, net	Sep. 29, 2012 Other, net	Sep. 28, 2013 Molson Coors Central Europe (MCCE) Other Foreign Exchange and Derivative Activity [Member]	Sep. 29, 2012 Molson Coors Central Europe (MCCE) Other Foreign Exchange and Derivative Activity [Member]	Sep. 28, 2013 Molson Coors Central Europe (MCCE) Other Foreign Exchange and Derivative Activity [Member]	Sep. 29, 2012 Molson Coors Central Europe (MCCE) Other Foreign Exchange and Derivative Activity [Member]	Sep. 29, 2012 Molson Coors Central Europe (MCCE) Other Foreign Exchange and Derivative Activity [Member] Foreign Exchange Contract [Member]	Sep. 28, 2013 Molson Coors Central Europe (MCCE) Other Foreign Exchange and Derivative Activity [Member] Foreign Exchange Contract [Member]	May 03, 2012 Senior Notes [Member]
Other income and expense:
Debt instrument, face amount					$ 575.0																																												$ 1,900.0
Other income (expense), net	(5.5)	(6.4)	(8.5)	(78.3)					0	[1]	0	[1]	0	[1]	(13.0)	[1]	0	[2]	0	[2]	0	[2]	(57.9)	[2]	0	[3]	0	[3]	1.2	0	(5.3)	[4]	(6.4)	[4]	(11.4)	[4]	(8.7)	[4]	(0.2)	0	1.7	1.3
Loss on foreign currency movements																																											(11.4)	(6.4)	(1.4)	(5.8)
Unrealized loss on derivative																																															1.8	(4.9)
Loss on derivatives, recognized in income						$ 4.3	$ (5.1)	$ (2.9)

[1] We incurred costs in connection with the issuance and subsequent termination of the bridge loan agreement entered into concurrent with the announcement of the Acquisition during the second quarter of 2012.

[2] In connection with the Acquisition, we used the proceeds from our issuance of the $1.9 billion senior notes to purchase Euros. As a result of an unfavorable foreign exchange movement between the Euro and USD prior to using these proceeds to fund the Acquisition, we realized a foreign exchange loss on our Euro cash holdings during the second quarter of 2012.

[3] During the first quarter of 2013, we realized a gain for proceeds received related to a non-income-related tax settlement resulting from historical activity within our former investment in the Montreal Canadiens.

[4] Included in this amount are losses of $11.4 million and $1.4 million for the third quarter and first three quarters of 2013, respectively, and losses of $6.4 million and $5.8 million for the third quarter and first three quarters of 2012, respectively, related to foreign currency movements on foreign-denominated financing instruments entered into in conjunction with the closing of the Acquisition. We additionally recorded a net gain of $1.8 million and loss of $4.9 million for the third quarter and first three quarters of 2013, respectively, related to foreign cash positions and foreign exchange contracts entered into to hedge our risk associated with the payment of this foreign-denominated debt. See Note 12, "Debt" and Note 14, "Derivative Instruments and Hedging Activities" for further discussion of financing and hedging activities related to the Acquisition. Additionally, we recorded gains of $4.3 million and losses of $5.1 million related to other foreign exchange and derivative activity during the third quarter and first three quarters of 2013, respectively. We recorded losses related to other foreign exchange and derivative activity of $2.9 million for the first three quarters of 2012.