Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Dec. 25, 2010
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	$ (129.7)
Amortization of net prior service costs and net actuarial losses to income(1)	(195.8)		(189.6)		100.4
Balance	(72.3)		(129.7)
Income tax expense	154.5		99.4	[1]	138.7
MillerCoors
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
MCBC economic Interest (as a percent)			42.00%
Reclassification Adjustments of Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Income tax expense	(1.6)		(4.5)		(1.3)
Amortization of Net Prior Service Costs and Net Actuarial Losses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Income tax expense	(5.4)		(3.6)		(2.8)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	838.6		906.3		784.8
Foreign currency translation adjustments	340.3		(49.6)		53.8
Unrealized gain (loss) on derivative instruments	0		0		0
Reclassification of derivative losses to income(1)	0	[2]	0	[2]	0	[2]
Pension and other postretirement benefit adjustments	0		0		0
Amortization of net prior service costs and net actuarial losses to income(1)	0	[2]	0	[2]	0	[2]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0		0		0
Reclassification from investment in MillerCoors	0	[3]
Tax benefit (expense)	8.6		(18.1)		67.7
Balance	1,187.5		838.6		906.3
Gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	1.7		(11.6)		(4.0)
Foreign currency translation adjustments	(1.6)		0		0
Unrealized gain (loss) on derivative instruments	(37.7)		(2.0)		(18.6)
Reclassification of derivative losses to income(1)	10.2	[2]	14.9	[2]	7.1	[2]
Pension and other postretirement benefit adjustments	0		0		0
Amortization of net prior service costs and net actuarial losses to income(1)	0	[2]	0	[2]	0	[2]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0		0		0
Reclassification from investment in MillerCoors	0	[3]
Tax benefit (expense)	9.7		0.4		3.9
Balance	(17.7)		1.7		(11.6)
Pension and Postretirement Benefit adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(676.8)		(497.4)		(605.6)
Foreign currency translation adjustments	(2.4)		0		0
Unrealized gain (loss) on derivative instruments	0		0		0
Reclassification of derivative losses to income(1)	0	[2]	0	[2]	0	[2]
Pension and other postretirement benefit adjustments	(176.5)		(255.8)		136.9
Amortization of net prior service costs and net actuarial losses to income(1)	36.3	[2]	13.8	[2]	10.6	[2]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0		0		0
Reclassification from investment in MillerCoors	0	[3]
Tax benefit (expense)	(24.7)		62.6		(39.3)
Balance	(844.1)		(676.8)		(497.4)
Equity Method Investments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(293.2)		(226.2)		(154.5)
Foreign currency translation adjustments	0		0		0
Unrealized gain (loss) on derivative instruments	0		0		0
Reclassification of derivative losses to income(1)	0	[2]	0	[2]	0	[2]
Pension and other postretirement benefit adjustments	0		0		0
Amortization of net prior service costs and net actuarial losses to income(1)	0	[2]	0	[2]	0	[2]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	(79.5)		(106.2)		(92.0)
Reclassification from investment in MillerCoors	(97.9)	[3]
Tax benefit (expense)	72.6		39.2		20.3
Balance	(398.0)		(293.2)		(226.2)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(129.7)		171.1		20.7
Foreign currency translation adjustments	336.3		(49.6)		53.8
Unrealized gain (loss) on derivative instruments	(37.7)		(2.0)		(18.6)
Reclassification of derivative losses to income(1)	10.2	[2]	14.9	[2]	7.1	[2]
Pension and other postretirement benefit adjustments	(176.5)		(255.8)		136.9
Amortization of net prior service costs and net actuarial losses to income(1)	36.3	[2]	13.8	[2]	10.6	[2]
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	(79.5)		(106.2)		(92.0)
Reclassification from investment in MillerCoors	(97.9)	[3]
Tax benefit (expense)	66.2		84.1		52.6
Balance	$ (72.3)		$ (129.7)		$ 171.1

[1] Our deferred tax expense and current tax expense for the year ended December 31, 2011, have been adjusted to reflect the correction of an immaterial misclassification within this table of $16.6 million.

[2] The tax benefit recognized on reclassification of derivative losses to income was $1.6 million, $4.5 million and $1.3 million for the fiscal years 2012, 2011 and 2010, respectively. The tax benefit recognized on reclassification of net prior service costs and net actuarial losses to income was $5.4 million, $3.6 million and $2.8 million for the fiscal years 2012, 2011 and 2010, respectively.

[3] During 2012 we recorded a reclassification from the investment in MillerCoors to AOCI reflecting our proportional share of MillerCoors AOCI at formation. See Note 5, "Investments" for further discussion.