Investments Variable Interest Entity (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Grolsch
Variable Interest Entity
Total Assets	$ 4.9	$ 4.8
Total Liabilities	0.1	0.2
Cobra
Variable Interest Entity
Total Assets	17.7	20.2
Total Liabilities	1.2	2.1
Rocky Mountain Metal Container [Member]
Variable Interest Entity
Total Assets	72.9	74.4
Total Liabilities	4.7	4.4
Rocky Mountain Bottle Company [Member]
Variable Interest Entity
Total Assets	67.6	56.2
Total Liabilities	$ 6.4	$ 4.6