Goodwill and Intangible Assets Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Oct. 11, 2016	Nov. 11, 2015
Goodwill activity:
Balance at beginning of year	$ 1,983,300,000	$ 2,191,600,000
Goodwill, Acquired During Period	6,415,000,000	10,200,000
Goodwill, Impairment Loss	(15,700,000)	0
Foreign currency translation	(132,500,000)	(218,500,000)
Balance at end of year	$ 8,250,100,000	1,983,300,000
Europe [Member]
Goodwill [Line Items]
Percentage Of Fair Value Exceeding Carrying Value	14.00%
Goodwill activity:
Balance at beginning of year	$ 1,408,700,000	1,528,000,000
Goodwill, Written off Related to Sale of Business Unit		(6,700,000)
Goodwill, Acquired During Period	0
Goodwill, Impairment Loss	0
Foreign currency translation	(148,200,000)	(112,600,000)
Balance at end of year	1,260,500,000	1,408,700,000
U.S.
Goodwill activity:
Balance at beginning of year	0	0
Goodwill, Acquired During Period	6,415,600,000	0
Goodwill, Impairment Loss	0
Foreign currency translation	0	0
Balance at end of year	$ 6,415,600,000	0
Canada
Goodwill [Line Items]
Percentage Of Fair Value Exceeding Carrying Value	29.00%
Goodwill activity:
Balance at beginning of year	$ 551,400,000	656,500,000
Goodwill, Acquired During Period	0	0
Goodwill, Impairment Loss	0
Foreign currency translation	16,200,000	(105,100,000)
Balance at end of year	567,600,000	551,400,000
MCI
Goodwill activity:
Balance at beginning of year	23,200,000	7,100,000
Purchase price adjustment	(600,000)
Goodwill, Acquired During Period		16,900,000
Goodwill, Impairment Loss	(15,700,000)
Foreign currency translation	(500,000)	(800,000)
Balance at end of year	$ 6,400,000	$ 23,200,000
Millercoors [Member]
Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 9,875,000,000
Business Acquisition, Percentage of Economic Interests Acquired				58.00%