Supplemental Guarantor Information Income statement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	$ 1,184.8	$ 1,008.1
Excise taxes	(356.3)	(316.7)
Net sales	828.5	691.4
Cost of goods sold	(547.1)	(438.8)
Gross profit	281.4	252.6
Marketing, general and administrative expenses	(285.3)	(248.2)
Special items, net	(1.5)	(1.5)
Equity income in MillerCoors	117.4	118.9
Operating income (loss)	112.0	121.8
Interest income (expense), net	(74.9)	(23.8)
Other income (expense), net	4.3	(1.4)
Income (loss) from continuing operations before income taxes	41.4	96.6
Income tax benefit (expense)	(3.5)	(17.3)
Net Income (loss) from continuing operations	37.9	79.3
Income (loss) from discontinued operations, net of tax	(0.9)	0.1
Net income (loss) including noncontrolling interests	37.0	79.4
Add back (less): Loss (net income) attributable to noncontrolling interests		0.1
Net income (loss) attributable to MCBC	35.6	79.5
Comprehensive income attributable to MCBC	(206.2)	190.6
Parent Guarantor, 2007 and 2012 Issuer [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	3.9	5.5
Excise taxes	0	0
Net sales	3.9	5.5
Cost of goods sold	0	0
Gross profit	3.9	5.5
Marketing, general and administrative expenses	(37.1)	(34.5)
Special items, net	(0.3)	(1.1)
Equity income (loss) in subsidiaries	103.5	85.0
Equity income in MillerCoors	0	0
Operating income (loss)	70.0	54.9
Interest income (expense), net	(26.0)	0
Other income (expense), net	(13.6)	12.0
Income (loss) from continuing operations before income taxes	30.4	66.9
Income tax benefit (expense)	5.2	12.6
Net Income (loss) from continuing operations	35.6	79.5
Income (loss) from discontinued operations, net of tax	0	0
Net income (loss) including noncontrolling interests	35.6	79.5
Add back (less): Loss (net income) attributable to noncontrolling interests	0	0
Net income (loss) attributable to MCBC	35.6	79.5
Comprehensive income attributable to MCBC	(206.2)	190.6
Subsidiary Guarantors
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	972.8	982.7
Excise taxes	(303.8)	(303.9)
Net sales	669.0	678.8
Cost of goods sold	(427.7)	(416.6)
Gross profit	241.3	262.2
Marketing, general and administrative expenses	(179.0)	(202.0)
Special items, net	(0.8)	(0.4)
Equity income (loss) in subsidiaries	(146.4)	(117.6)
Equity income in MillerCoors	117.4	118.9
Operating income (loss)	32.5	61.1
Interest income (expense), net	48.1	74.1
Other income (expense), net	30.8	(12.6)
Income (loss) from continuing operations before income taxes	111.4	122.6
Income tax benefit (expense)	(8.0)	(37.7)
Net Income (loss) from continuing operations	103.4	84.9
Income (loss) from discontinued operations, net of tax	0	0
Net income (loss) including noncontrolling interests	103.4	84.9
Add back (less): Loss (net income) attributable to noncontrolling interests	0	0
Net income (loss) attributable to MCBC	103.4	84.9
Comprehensive income attributable to MCBC	(119.3)	219.4
Subsidiary Non-Guarantors
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	240.4	59.7
Excise taxes	(52.5)	(12.8)
Net sales	187.9	46.9
Cost of goods sold	(146.7)	(54.5)
Gross profit	41.2	(7.6)
Marketing, general and administrative expenses	(74.2)	(19.2)
Special items, net	(0.4)	0
Equity income (loss) in subsidiaries	41.4	26.0
Equity income in MillerCoors	0	0
Operating income (loss)	8.0	(0.8)
Interest income (expense), net	(97.0)	(97.9)
Other income (expense), net	(12.9)	(0.8)
Income (loss) from continuing operations before income taxes	(101.9)	(99.5)
Income tax benefit (expense)	(0.7)	7.8
Net Income (loss) from continuing operations	(102.6)	(91.7)
Income (loss) from discontinued operations, net of tax	(0.9)	0.1
Net income (loss) including noncontrolling interests	(103.5)	(91.6)
Add back (less): Loss (net income) attributable to noncontrolling interests	(1.4)	0.1
Net income (loss) attributable to MCBC	(104.9)	(91.5)
Comprehensive income attributable to MCBC	(216.2)	(100.6)
Eliminations
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	(32.3)	(39.8)
Excise taxes	0	0
Net sales	(32.3)	(39.8)
Cost of goods sold	27.3	32.3
Gross profit	(5.0)	(7.5)
Marketing, general and administrative expenses	5.0	7.5
Special items, net	0	0
Equity income (loss) in subsidiaries	1.5	6.6
Equity income in MillerCoors	0	0
Operating income (loss)	1.5	6.6
Interest income (expense), net	0	0
Other income (expense), net	0	0
Income (loss) from continuing operations before income taxes	1.5	6.6
Income tax benefit (expense)	0	0
Net Income (loss) from continuing operations	1.5	6.6
Income (loss) from discontinued operations, net of tax	0	0
Net income (loss) including noncontrolling interests	1.5	6.6
Add back (less): Loss (net income) attributable to noncontrolling interests	0	0
Net income (loss) attributable to MCBC	1.5	6.6
Comprehensive income attributable to MCBC	335.5	(118.8)
Consolidated [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	1,184.8	1,008.1
Excise taxes	(356.3)	(316.7)
Net sales	828.5	691.4
Cost of goods sold	(547.1)	(438.8)
Gross profit	281.4	252.6
Marketing, general and administrative expenses	(285.3)	(248.2)
Special items, net	(1.5)	(1.5)
Equity income (loss) in subsidiaries	0	0
Equity income in MillerCoors	117.4	118.9
Operating income (loss)	112.0	121.8
Interest income (expense), net	(74.9)	(23.8)
Other income (expense), net	4.3	(1.4)
Income (loss) from continuing operations before income taxes	41.4	96.6
Income tax benefit (expense)	(3.5)	(17.3)
Net Income (loss) from continuing operations	37.9	79.3
Income (loss) from discontinued operations, net of tax	(0.9)	0.1
Net income (loss) including noncontrolling interests	37.0	79.4
Add back (less): Loss (net income) attributable to noncontrolling interests	(1.4)	0.1
Net income (loss) attributable to MCBC	35.6	79.5
Comprehensive income attributable to MCBC	$ (206.2)	$ 190.6