Investments Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 CAD VIE	Sep. 30, 2016 USD ($) VIE	Dec. 31, 2015 USD ($) VIE
Schedule of Equity Method Investments [Line Items]
Number of Variable Interest Entities with Debt | VIE					0	0	0
Revolving credit facility, maximum borrowing capacity						$ 750.0
Guarantees, Fair Value Disclosure						20.6	$ 16.9
MillerCoors
Schedule of Equity Method Investments [Line Items]
Equity Method Investments, Intercompany Transactions, Net Payables Due						$ 8.2	$ 7.6
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	$ 25.7		$ 25.7
Business Exit Costs	8.3	$ 28.0	84.6	$ 28.0
Accelerated depreciation expense	$ 34.3	$ 21.8	$ 103.2	$ 21.8
Brewers' Retail Inc. (BRI) [Member]
Schedule of Equity Method Investments [Line Items]
Guarantee obligation, percentage	45.90%
Brewers' Retail Inc. (BRI) [Member] | Revolving credit facility [Member] | Canadian Imperial Bank of Commerce (CIBC) [Member]
Schedule of Equity Method Investments [Line Items]
Revolving credit facility, maximum borrowing capacity | CAD					CAD 150,000,000
Revolving credit facility, renewal option, term	1 year