Special Items Restructuring Accruals (Details) $ in Millions	3 Months Ended	12 Months Ended			24 Months Ended
	Dec. 31, 2016 USD ($) employee	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) employee	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring, Settlement and Impairment Provisions		$ (2,523.9)	$ 346.7	$ 324.4
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance		9.2	15.5	24.7	$ 24.7
Balance assumed in Acquisition		6.9
Charges incurred		9.4	9.5	14.2
Payments made		(8.0)	(13.7)	(19.7)
Restructuring Reserve, Accrual Adjustment		(2.1)	(1.2)	(2.6)
Foreign currency and other adjustments		(0.7)	(0.9)	(1.1)
Restructuring accruals, ending balance	$ 14.7	14.7	9.2	15.5	9.2
MCI
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance		1.3	0.0	0.5	0.5
Balance assumed in Acquisition		0.0
Charges incurred		0.3	3.2	0.0
Payments made		(1.4)	(1.9)	(0.5)
Restructuring Reserve, Accrual Adjustment		0.0	0.0	0.0
Foreign currency and other adjustments		0.0	0.0	0.0
Restructuring accruals, ending balance	0.2	0.2	1.3	0.0	1.3
Corporate
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance		0.0	0.2	0.9	0.9
Balance assumed in Acquisition		0.0
Charges incurred		0.7	0.0	0.3
Payments made		0.0	(0.2)	(1.0)
Restructuring Reserve, Accrual Adjustment		0.0	0.0	0.0
Foreign currency and other adjustments		0.0	0.0	0.0
Restructuring accruals, ending balance	0.7	0.7	0.0	0.2	0.0
Canada
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance		2.3	3.8	9.7	9.7
Balance assumed in Acquisition		0.0
Charges incurred		4.0	2.1	7.6
Payments made		(0.4)	(3.1)	(13.0)
Restructuring Reserve, Accrual Adjustment		0.0	0.0	0.0
Foreign currency and other adjustments		0.0	(0.5)	(0.5)
Restructuring accruals, ending balance	5.9	5.9	2.3	3.8	2.3
Europe [Member]
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance		5.6	11.5	13.6	13.6
Balance assumed in Acquisition		0.0
Charges incurred		1.2	4.2	6.3
Payments made		(1.2)	(8.5)	(5.2)
Restructuring Reserve, Accrual Adjustment		(2.1)	(1.2)	(2.6)
Foreign currency and other adjustments		(0.7)	(0.4)	(0.6)
Restructuring accruals, ending balance	2.8	2.8	5.6	$ 11.5	5.6
U.S.
Restructuring Reserve [Roll Forward]
Restructuring accruals, beginning balance		0.0
Balance assumed in Acquisition		6.9
Charges incurred		3.2
Payments made		(5.0)
Restructuring Reserve, Accrual Adjustment		0.0
Foreign currency and other adjustments		0.0
Restructuring accruals, ending balance	$ 5.1	$ 5.1	$ 0.0		$ 0.0
CHINA
Restructuring Reserve [Roll Forward]
Number of positions eliminated | employee			125
Minimum
Restructuring Reserve [Roll Forward]
Payment of Severance Obligations, Term		12 months
Maximum
Restructuring Reserve [Roll Forward]
Payment of Severance Obligations, Term		24 months
Millercoors [Member]
Restructuring Reserve [Roll Forward]
Charges incurred		$ 9.3
Number of positions eliminated | employee	44
Millercoors [Member] | Minimum
Restructuring Reserve [Roll Forward]
Accrued Restructuring Balance, Period Expected to be Paid		12 months
Millercoors [Member] | Maximum
Restructuring Reserve [Roll Forward]
Accrued Restructuring Balance, Period Expected to be Paid		24 months