Investments Financials (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Nov. 11, 2015
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Total equity	$ 9,940.4		$ 9,940.4		$ 7,063.1
MillerCoors
Condensed balance sheets
Current assets	949.5		949.5		800.5
Noncurrent assets	9,221.5		9,221.5		9,099.5
Total assets	10,171.0		10,171.0		9,900.0
Current liabilities	1,102.7		1,102.7		1,180.1
Noncurrent liabilities	1,283.5		1,283.5		1,407.0
Total liabilities	2,386.2		2,386.2		2,587.1
Noncontrolling interests	17.5		17.5		20.1
Owners' equity	7,767.3		7,767.3		7,292.8
Total liabilities and equity	10,171.0		10,171.0		9,900.0
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Total equity	$ 7,767.3		$ 7,767.3		$ 7,292.8
MCBC economic interest	42.00%	42.00%	42.00%	42.00%	42.00%
MCBC proportionate share of MillerCoors equity	$ 3,262.3		$ 3,262.3		$ 3,063.0
Difference between MCBC contributed cost basis and proportionate share of the underlying equity in net assets of MillerCoors	(653.7)		(653.7)		(657.0)
Equity Method Investment, Difference From Accounting Policy Elections	35.0		35.0		35.0
Investment in MillerCoors	2,643.6		2,643.6		$ 2,441.0
Results of operations
Net sales	2,007.7	$ 2,000.0	5,950.5	$ 5,977.3
Cost of goods sold	(1,150.8)	(1,173.9)	(3,358.3)	(3,490.6)
Gross profit	856.9	826.1	2,592.2	2,486.7
Operating income	373.4	323.0	1,145.6	1,125.7
Net income attributable to MillerCoors	369.2	316.5	1,134.0	1,108.3
Business Exit Costs	8.3	28.0	84.6	28.0
Accelerated depreciation expense	34.3	$ 21.8	103.2	$ 21.8
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	$ 25.7		$ 25.7
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%