Supplemental Guarantor Information Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011	Sep. 24, 2011	Dec. 25, 2010
Current assets:
Cash and cash equivalents	$ 585.7	$ 1,078.9	$ 987.2	$ 1,217.6
Accounts receivable, net	642.6	588.8
Other receivables, net	127.1	137.2
Total inventories, net	265.8	207.2
Other assets, net	130.2	94.0
Deferred tax assets	29.4	11.6
Discontinued operations	0	0.3
Total current assets	1,780.8	2,118.0
Properties, net	2,001.0	1,430.1
Goodwill	2,415.6	1,453.3
Other intangibles, net	7,226.9	4,586.0
Investment in MillerCoors	2,626.6	2,487.9
Deferred tax assets	161.5	149.9
Total assets	16,466.5	12,423.8
Current liabilities :
Accounts payable	488.9	301.2
Derivative hedging instruments	9.8	107.6
Deferred tax liabilities	171.8	161.3
Short-term borrowings and current portion of long-term debt	1,258.6	46.9
Discontinued operations	7.9	13.4
Total current liabilities	2,725.2	1,277.2
Long-term debt	3,438.1	1,914.9
Pension and post-retirement benefits	696.6	697.5
Derivative hedging instruments	226.5	212.5
Deferred tax liabilities	903.6	455.6
Discontinued operations	20.2	22.0
Total liabilities	8,187.3	4,733.6
MCBC stockholders' equity	8,225.2	7,647.9
Noncontrolling interests	54.0	42.3
Total equity	8,279.2	7,690.2
Total liabilities and equity	16,466.5	12,423.8
Parent Guarantor, 2007 and 2012 Issuer [Member]
Current assets:
Cash and cash equivalents	98.1	601.1	603.9	832.0
Accounts receivable, net	1.9	0.9
Other receivables, net	35.3	46.9
Total inventories, net	0	0
Other assets, net	9.7	9.7
Deferred tax assets	0	0
Discontinued operations		0
Intercompany accounts receivable	0	0
Total current assets	145.0	658.6
Properties, net	26.9	27.6
Goodwill	0	0
Other intangibles, net	0	0
Investment in MillerCoors	0	0
Net investment in and advances to subsidiaries	11,513.7	7,925.2
Deferred tax assets	34.4	33.1
Other assets, net	39.5	19.8
Total assets	11,759.5	8,664.3
Current liabilities :
Accounts payable	10.6	7.3
Accrued expenses and other liabilities	63.5	34.6
Derivative hedging instruments	0	0
Deferred tax liabilities	6.6	6.2
Short-term borrowings and current portion of long-term debt	559.6	0
Discontinued operations	0	0
Intercompany accounts payable	984.1	413.8
Total current liabilities	1,624.4	461.9
Long-term debt	1,895.6	546.2
Pension and post-retirement benefits	0	0
Derivative hedging instruments	0	0
Deferred tax liabilities	0	0
Other liabilities, net	14.3	8.3
Discontinued operations	0	0
Intercompany notes payables	0	0
Total liabilities	3,534.3	1,016.4
MCBC stockholders' equity	9,084.6	8,267.8
Intercompany notes receivable	(859.4)	(619.9)
Total stockholders' equity	8,225.2	7,647.9
Noncontrolling interests	0	0
Total equity	8,225.2	7,647.9
Total liabilities and equity	11,759.5	8,664.3
Subsidiary Guarantors
Current assets:
Cash and cash equivalents	291.3	422.5	335.0	349.5
Accounts receivable, net	455.4	550.8
Other receivables, net	82.5	84.0
Total inventories, net	214.6	193.0
Other assets, net	78.0	74.2
Deferred tax assets	0	0
Discontinued operations		0
Intercompany accounts receivable	1,863.9	1,522.0
Total current assets	2,985.7	2,846.5
Properties, net	1,337.1	1,314.0
Goodwill	1,073.4	1,033.0
Other intangibles, net	4,672.8	4,525.3
Investment in MillerCoors	2,626.6	2,487.9
Net investment in and advances to subsidiaries	2,063.7	1,056.3
Deferred tax assets	155.1	149.2
Other assets, net	152.9	155.6
Total assets	15,067.3	13,567.8
Current liabilities :
Accounts payable	282.2	256.1
Accrued expenses and other liabilities	558.1	579.9
Derivative hedging instruments	9.7	107.6
Deferred tax liabilities	165.4	155.6
Short-term borrowings and current portion of long-term debt	671.2	44.7
Discontinued operations	0	0
Intercompany accounts payable	896.8	1,646.6
Total current liabilities	2,583.4	2,790.5
Long-term debt	1,421.3	1,368.7
Pension and post-retirement benefits	690.3	212.5
Derivative hedging instruments	226.5	693.6
Deferred tax liabilities	0	0
Other liabilities, net	47.7	53.0
Discontinued operations	0	0
Intercompany notes payables	1,136.0	1,504.0
Total liabilities	6,105.2	6,622.3
MCBC stockholders' equity	15,221.3	11,917.0
Intercompany notes receivable	(6,259.2)	(4,971.5)
Total stockholders' equity	8,962.1	6,945.5
Noncontrolling interests	0	0
Total equity	8,962.1	6,945.5
Total liabilities and equity	15,067.3	13,567.8
Subsidiary Non-Guarantors
Current assets:
Cash and cash equivalents	196.3	55.3	48.3	36.1
Accounts receivable, net	185.3	37.1
Other receivables, net	9.3	6.3
Total inventories, net	51.2	14.2
Other assets, net	42.5	10.1
Deferred tax assets	29.9	12.1
Discontinued operations		0.3
Intercompany accounts receivable	887.3	1,612.9
Total current assets	1,401.8	1,748.3
Properties, net	637.0	88.5
Goodwill	1,342.2	420.3
Other intangibles, net	2,554.1	60.7
Investment in MillerCoors	0	0
Net investment in and advances to subsidiaries	5,899.3	5,363.3
Deferred tax assets	6.5	2.3
Other assets, net	61.7	23.2
Total assets	11,902.6	7,706.6
Current liabilities :
Accounts payable	196.1	37.8
Accrued expenses and other liabilities	166.6	32.3
Derivative hedging instruments	0.1	0
Deferred tax liabilities	0.3	0
Short-term borrowings and current portion of long-term debt	27.8	2.2
Discontinued operations	7.9	13.4
Intercompany accounts payable	870.3	1,074.5
Total current liabilities	1,269.1	1,160.2
Long-term debt	121.2	0
Pension and post-retirement benefits	6.3	0
Derivative hedging instruments	0	3.9
Deferred tax liabilities	938.1	490.3
Other liabilities, net	115.1	92.6
Discontinued operations	20.2	22.0
Intercompany notes payables	6,904.2	4,971.6
Total liabilities	9,374.2	6,740.6
MCBC stockholders' equity	3,396.0	1,807.9
Intercompany notes receivable	(921.6)	(884.2)
Total stockholders' equity	2,474.4	923.7
Noncontrolling interests	54.0	42.3
Total equity	2,528.4	966.0
Total liabilities and equity	11,902.6	7,706.6
Eliminations
Current assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Other receivables, net	0	0
Total inventories, net	0	0
Other assets, net	0	0
Deferred tax assets	(0.5)	(0.5)
Discontinued operations		0
Intercompany accounts receivable	(2,751.2)	(3,134.9)
Total current assets	(2,751.7)	(3,135.4)
Properties, net	0	0
Goodwill	0	0
Other intangibles, net	0	0
Investment in MillerCoors	0	0
Net investment in and advances to subsidiaries	(19,476.7)	(14,344.8)
Deferred tax assets	(34.5)	(34.7)
Other assets, net	0	0
Total assets	(22,262.9)	(17,514.9)
Current liabilities :
Accounts payable	0	0
Accrued expenses and other liabilities	0	0
Derivative hedging instruments	0	0
Deferred tax liabilities	(0.5)	(0.5)
Short-term borrowings and current portion of long-term debt	0	0
Discontinued operations	0	0
Intercompany accounts payable	(2,751.2)	(3,134.9)
Total current liabilities	(2,751.7)	(3,135.4)
Long-term debt	0	0
Pension and post-retirement benefits	0	0
Derivative hedging instruments	0	0
Deferred tax liabilities	(34.5)	(34.7)
Other liabilities, net	0	0
Discontinued operations	0	0
Intercompany notes payables	(8,040.2)	(6,475.6)
Total liabilities	(10,826.4)	(9,645.7)
MCBC stockholders' equity	(19,476.7)	(14,344.8)
Intercompany notes receivable	8,040.2	6,475.6
Total stockholders' equity	(11,436.5)	(7,869.2)
Noncontrolling interests	0	0
Total equity	(11,436.5)	(7,869.2)
Total liabilities and equity	(22,262.9)	(17,514.9)
Consolidated [Member]
Current assets:
Cash and cash equivalents	585.7	1,078.9	987.2	1,217.6
Accounts receivable, net	642.6	588.8
Other receivables, net	127.1	137.2
Total inventories, net	265.8	207.2
Other assets, net	130.2	94.0
Deferred tax assets	29.4	11.6
Discontinued operations		0.3
Intercompany accounts receivable	0	0
Total current assets	1,780.8	2,118.0
Properties, net	2,001.0	1,430.1
Goodwill	2,415.6	1,453.3
Other intangibles, net	7,226.9	4,586.0
Investment in MillerCoors	2,626.6	2,487.9
Net investment in and advances to subsidiaries	0	0
Deferred tax assets	161.5	149.9
Other assets, net	254.1	198.6
Total assets	16,466.5	12,423.8
Current liabilities :
Accounts payable	488.9	301.2
Accrued expenses and other liabilities	788.2	646.8
Derivative hedging instruments	9.8	107.6
Deferred tax liabilities	171.8	161.3
Short-term borrowings and current portion of long-term debt	1,258.6	46.9
Discontinued operations	7.9	13.4
Intercompany accounts payable	0	0
Total current liabilities	2,725.2	1,277.2
Long-term debt	3,438.1	1,914.9
Pension and post-retirement benefits	696.6	212.5
Derivative hedging instruments	226.5	697.5
Deferred tax liabilities	903.6	455.6
Other liabilities, net	177.1	153.9
Discontinued operations	20.2	22.0
Intercompany notes payables	0	0
Total liabilities	8,187.3	4,733.6
MCBC stockholders' equity	8,225.2	7,647.9
Intercompany notes receivable	0	0
Total stockholders' equity	8,225.2	7,647.9
Noncontrolling interests	54.0	42.3
Total equity	8,279.2	7,690.2
Total liabilities and equity	$ 16,466.5	$ 12,423.8