Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended													6 Months Ended
	Jun. 30, 2012		Jun. 30, 2012 Canada	Dec. 31, 2011 Canada	Jun. 30, 2012 Central Europe		Dec. 31, 2011 Central Europe		Jun. 30, 2012 U.K.	Dec. 31, 2011 U.K.	Jun. 30, 2012 MCI	Dec. 31, 2011 MCI	Jun. 30, 2012 MC Si Hai [Member]	Jun. 30, 2012 Brand and Distribution Rights [Member]	Dec. 31, 2011 Carling [Member]	Jun. 30, 2012 Carling [Member] U.K.
Goodwill [Line Items]
Goodwill	$ 2,288.0		$ 692.7	$ 689.5	$ 833.4	[1]	$ 0	[1]	$ 753.9	$ 746.1	$ 8.0	$ 17.7	$ 9.5			$ 753.9
Indefinite-lived Intangible Assets																315.9
Impairment of Intangible Assets, Finite-lived														0.9
Goodwill activity:
Balance at beginning of year	1,453.3		692.7	689.5	833.4	[1]	0	[1]	753.9	746.1	8.0	17.7	9.5			753.9
Business acquisitions	831.5	[2]
China impairment	(9.5)	[3]
Foreign currency translation	12.3
Purchase price adjustment	0.4
Balance at end of year	$ 2,288.0		$ 692.7	$ 689.5	$ 833.4	[1]	$ 0	[1]	$ 753.9	$ 746.1	$ 8.0	$ 17.7	$ 9.5			$ 753.9
Percentage Of Fair Value Exceeding Carrying Value										25.00%			4.00%		175.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners													49.00%

[1] We have initially attributed the preliminary goodwill arising from the Acquisition to our Central Europe segment. This allocation is subject to change as we finalize purchase accounting, which we expect to occur during 2012.

[2] On June 15, 2012, we completed the Acquisition. See Note 3, "Acquisition of StarBev" for further discussion.

[3] See further discussion below.