Investments Financials (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Nov. 11, 2015
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Total equity	$ 9,871.9		$ 9,871.9		$ 7,063.1
MillerCoors
Condensed balance sheets
Current assets	966.3		966.3		800.5
Noncurrent assets	9,014.4		9,014.4		9,099.5
Total assets	9,980.7		9,980.7		9,900.0
Current liabilities	1,118.4		1,118.4		1,180.1
Noncurrent liabilities	1,278.5		1,278.5		1,407.0
Total liabilities	2,396.9		2,396.9		2,587.1
Noncontrolling interests	19.7		19.7		20.1
Owners' equity	7,564.1		7,564.1		7,292.8
Total liabilities and equity	9,980.7		9,980.7		9,900.0
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Total equity	$ 7,564.1		$ 7,564.1		$ 7,292.8
MCBC economic interest	42.00%	42.00%	42.00%	42.00%	42.00%
MCBC proportionate share of MillerCoors equity	$ 3,176.9		$ 3,176.9		$ 3,063.0
Difference between MCBC contributed cost basis and proportional share of the underlying equity in net assets of MillerCoors	(654.8)		(654.8)		(657.0)
Equity Method Investment, Difference From Accounting Policy Elections	35.0		35.0		35.0
Investment in MillerCoors	2,557.1		2,557.1		$ 2,441.0
Results of operations
Net sales	2,126.7	$ 2,202.7	3,942.8	$ 3,977.3
Cost of goods sold	(1,174.5)	(1,240.5)	(2,207.5)	(2,316.7)
Gross profit	952.2	962.2	1,735.3	1,660.6
Operating income	435.7	493.4	772.2	802.7
Net income attributable to MillerCoors	429.5	$ 487.2	764.8	$ 791.8
Business Exit Costs	39.4		76.3
Accelerated depreciation expense	33.0		68.9
Restructuring costs and special charges	$ 6.4		$ 7.4
MillerCoors
Schedule of Equity Method Investments [Line Items]
Business Acquisition, Percentage of Economic Interests Acquired						58.00%
Results of operations
Business Acquisition, Percentage of Voting Interests Acquired						50.00%
Business Acquisition, Percentage of Equity and Voting Interests Acquired						100.00%