Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 29, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	$ 154.9
Pension and other postretirement benefit adjustments			0.1
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income(1)	(136.8)		240.7		(195.8)
Balance	(898.4)		154.9
MillerCoors
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
MCBC economic Interest (as a percent)	42.00%
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	979.1		1,187.5		838.6
Foreign currency translation adjustments	(818.0)		(177.7)		340.3
Unrealized gain (loss) on derivative instruments	0		0		0
Reclassification of derivative (gain) loss to income(1)	0	[1]	0	[1]	0	[1]
Pension and other postretirement benefit adjustments	0		0		0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income(1)	0	[1]	0	[1]	0	[1]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0		0		0
Tax adjustment related to investment in MillerCoors reclassification			0	[2]	0	[2]
Tax benefit (expense)	(31.3)		(30.7)		8.6
Balance	129.8		979.1		1,187.5
Gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	14.6		(17.7)		1.7
Foreign currency translation adjustments	(8.9)		0		(1.6)
Unrealized gain (loss) on derivative instruments	3.8		58.6		(37.7)
Reclassification of derivative (gain) loss to income(1)	3.8	[1]	(5.5)	[1]	10.2	[1]
Pension and other postretirement benefit adjustments	0		0		0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income(1)	0	[1]	0	[1]	0	[1]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0		0		0
Tax adjustment related to investment in MillerCoors reclassification			0	[2]	0	[2]
Tax benefit (expense)	1.7		(20.8)		9.7
Balance	15.0		14.6		(17.7)
Pension and Postretirement Benefit adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(556.3)		(844.1)		(676.8)
Foreign currency translation adjustments	8.4		0.7		(2.4)
Unrealized gain (loss) on derivative instruments	0		0		0
Reclassification of derivative (gain) loss to income(1)	0	[1]	0	[1]	0	[1]
Pension and other postretirement benefit adjustments	(172.3)		278.0		(176.5)
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income(1)	33.0	[1]	53.7	[1]	36.3	[1]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0		0		0
Tax adjustment related to investment in MillerCoors reclassification			0	[2]	0	[2]
Tax benefit (expense)	28.7		(44.6)		(24.7)
Balance	(658.5)		(556.3)		(844.1)
Equity Method Investments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(282.5)		(398.0)		(293.2)
Foreign currency translation adjustments	0		0		0
Unrealized gain (loss) on derivative instruments	0		0		0
Reclassification of derivative (gain) loss to income(1)	0	[1]	0	[1]	0	[1]
Pension and other postretirement benefit adjustments	0		0		0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income(1)	0	[1]	0	[1]	0	[1]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	(157.5)		114.5		(79.5)
Tax adjustment related to investment in MillerCoors reclassification			34.3	[2]	(97.9)	[2]
Tax benefit (expense)	55.3		(33.3)		72.6
Balance	(384.7)		(282.5)		(398.0)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	154.9		(72.3)		(129.7)
Foreign currency translation adjustments	(818.5)		(177.0)		336.3
Unrealized gain (loss) on derivative instruments	3.8		58.6		(37.7)
Reclassification of derivative (gain) loss to income(1)	3.8	[1]	(5.5)		10.2
Pension and other postretirement benefit adjustments	(172.3)		278.0		(176.5)
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income(1)	33.0	[1]	53.7		36.3
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	(157.5)		114.5		(79.5)
Tax adjustment related to investment in MillerCoors reclassification			34.3		(97.9)
Tax benefit (expense)	54.4		(129.4)		66.2
Balance	$ (898.4)		$ 154.9		$ (72.3)

[1] The tax benefit (expense) recognized on reclassification of derivative gains and losses to income was $1.5 million, $(2.3) million and $1.6 million for 2014, 2013 and 2012, respectively. The tax benefit recognized on reclassification of net prior service costs and net actuarial gains and losses to income was $6.8 million, $7.3 million and $5.4 million for 2014, 2013 and 2012, respectively.

[2] During the first quarter of 2013, we recorded a tax adjustment related to the reclassification of amounts from the investment in MillerCoors to AOCI that was recorded in the fourth quarter of 2012 to reflect our proportionate share of MillerCoors AOCI at formation. We made this reclassification in 2012 as we believe the new presentation provides improved transparency of our share of MillerCoors AOCI. This tax adjustment, which should have been made in 2012 with the reclassification, was not material to either the current or prior period financial statements taken as a whole and therefore the adjustment was recorded in 2013 and prior periods do not reflect the adjustment.