Investments Financials (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Total equity	$ 7,272.7		$ 7,272.7		$ 7,886.1
Results of operations
Restructuring costs and special charges	28.0
Accelerated depreciation expense	21.8
MillerCoors
Condensed balance sheets
Current assets	923.5		923.5		795.3
Noncurrent assets	8,983.4		8,983.4		9,047.4
Total assets	9,906.9		9,906.9		9,842.7
Current liabilities	1,131.0		1,131.0		1,061.3
Noncurrent liabilities	1,463.5		1,463.5		1,578.8
Total liabilities	2,594.5		2,594.5		2,640.1
Noncontrolling interests	17.4		17.4		23.5
Owners' equity	7,295.0		7,295.0		7,179.1
Total liabilities and equity	9,906.9		9,906.9		9,842.7
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Total equity	$ 7,295.0		$ 7,295.0		$ 7,179.1
MCBC economic interest	42.00%	42.00%	42.00%	42.00%	42.00%
MCBC proportionate share of MillerCoors equity	$ 3,063.9		$ 3,063.9		$ 3,015.2
Difference between MCBC contributed cost basis and proportional share of the underlying equity in net assets of MillerCoors	(658.2)		(658.2)		(661.6)
Equity Method Investment, Difference From Accounting Policy Elections	35.0		35.0		35.0
Investment in MillerCoors	2,440.7		2,440.7		$ 2,388.6
Results of operations
Net sales	2,000.0	$ 2,069.5	5,977.3	$ 6,066.6
Cost of goods sold	(1,173.9)	(1,237.7)	(3,490.6)	(3,614.2)
Gross profit	826.1	831.8	2,486.7	2,452.4
Operating income	323.0	381.9	1,125.7	1,129.2
Net income attributable to MillerCoors	$ 316.5	376.5	1,108.3	1,112.9
Restructuring costs and special charges		$ 0.2	28.0	$ 1.4
Accelerated depreciation expense			$ 21.8