Pending Acquisition (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions				3 Months Ended		9 Months Ended
	Oct. 11, 2016	Jul. 07, 2016	Feb. 03, 2016	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Oct. 10, 2016	Dec. 31, 2015	Nov. 11, 2015
Business Acquisition [Line Items]
Stock Issued During Period, Value, New Issues			$ 2,500.0
Proceeds from issuance of common stock, net						$ 2,525.6	$ 0.0
Stock Issued During Period, Shares, New Issues			29.9
Common Stock, Par or Stated Value Per Share					$ 0.01
Common Stock Issued Total Par Value					$ 0.3
Common Stock New Issues Additional Paid In Capital					$ 2,500.0
Debt issuance costs						60.2	$ 0.0
Investment in MillerCoors				$ 2,643.6		2,643.6			$ 2,441.0
MillerCoors
Business Acquisition [Line Items]
Business Acquisition, Percentage of Economic Interests Acquired										58.00%
Business Acquisition, Percentage of Voting Interests Acquired										50.00%
Payments for Operating Activities						70.6
2016 Notes [Member]
Business Acquisition [Line Items]
Proceeds from Debt, Net of Issuance Costs		$ 6,900.0
Lenders Party Thereto and Citibank | Bridge Loan | MillerCoors
Business Acquisition [Line Items]
Bridge Loan				6,800.0		$ 6,800.0
Debt Instrument, Term						364 days
Subsequent Event [Member] | MillerCoors
Business Acquisition [Line Items]
Business Acquisition, Percentage of Economic Interests Acquired	58.00%
Business Acquisition, Percentage of Voting Interests Acquired								50.00%
MCBC economic interest								42.00%
Business Combination, Consideration Transferred	$ 12,042.7
Corporate [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Costs associated with acquisition				17.2		$ 51.7
Corporate [Member] | Other income (expense), net [Member]
Business Acquisition [Line Items]
Costs associated with acquisition				11.0		61.2
Corporate [Member] | Interest Expense [Member]
Business Acquisition [Line Items]
Costs associated with acquisition				$ 39.3		$ 73.0