Investments Proportional (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
Schedule of Equity Method Investments [Line Items]
Equity income in MillerCoors	$ 156.9	$ 135.3	$ 491.2	$ 470.1
MillerCoors
Schedule of Equity Method Investments [Line Items]
Net income attributable to MillerCoors	$ 369.2	$ 316.5	$ 1,134.0	$ 1,108.3
MCBC economic interest	42.00%	42.00%	42.00%	42.00%	42.00%
MCBC proportionate share of MillerCoors net income	$ 155.1	$ 132.9	$ 476.3	$ 465.5
Amortization of the difference between MCBC contributed cost basis and proportionate share of the underlying equity in the net assets of MillerCoors	1.1	1.0	3.3	3.4
Share-based compensation adjustment	(0.5)	1.4	(0.7)	1.2
U.S. import tax benefit	1.2	0.0	12.3	0.0
Equity income in MillerCoors	$ 156.9	$ 135.3	$ 491.2	$ 470.1