Basis of Presentation and Summary of Significant Accounting Policies - Coronavirus Global Pandemic (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Unusual or Infrequent Item, or Both [Line Items]
Temporary "thank you" pay incentives	$ 15.5
Coronavirus Global Pandemic
Unusual or Infrequent Item, or Both [Line Items]
Liability for estimated sales returns due to global pandemic	31.1
Obsolete finished keg inventories	12.6
Allowance for obsolete inventory	14.0	$ 11.0
Allowance for credit loss	9.0	$ 12.0
Temporary deferral of income and non-income based tax payments	$ 200.0