Goodwill and Intangible Assets Amortization Expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 29, 2012	Dec. 31, 2013	Dec. 31, 2012
Estimated amortization expense of finite-lived intangible assets
2015	$ 27.1
2016	25.0
2017	12.8
2018	11.1
2019	11.1
Amortization expense of intangible assets	44.6	48.0	42.4
MillerCoors
Estimated amortization expense of finite-lived intangible assets
Amortization of the difference between MCBC contributed cost basis and proportionate share of the underlying equity in net assets of MillerCoors	$ 4.6			$ 4.6	$ 4.9