Investments Consolidated Variable Interest Entity and Other (Details) (USD $) In Millions, unless otherwise specified							12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012 Grolsch	Dec. 31, 2011 Grolsch	Dec. 29, 2012 Cobra	Dec. 31, 2011 Cobra	Dec. 29, 2012 Cobra
Variable Interest Entity
MCBC economic Interest (as a percent)			49.00%
Interest Purchased (as a percent)							50.10%
Total assets	$ 16,212.2	$ 12,423.8	$ 10.0	$ 20.4	$ 33.2	$ 31.6
Liabilities	$ 8,220.6	$ 4,733.6	$ 5.6	$ 12.9	$ 3.3	$ 3.0