Investments Variable Interest Entity (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Grolsch
Variable Interest Entity
Total Assets	$ 4.9	$ 4.8
Total Liabilities	0.2	0.2
Cobra
Variable Interest Entity
Total Assets	16.9	20.2
Total Liabilities	0.7	2.1
Rocky Mountain Metal Container [Member]
Variable Interest Entity
Total Assets	71.1	74.4
Total Liabilities	6.4	4.4
Rocky Mountain Bottle Company [Member]
Variable Interest Entity
Total Assets	96.6	56.2
Total Liabilities	$ 6.9	$ 4.6