Supplemental Guarantor Information Income statement (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	$ 1,407.0	$ 1,433.0	$ 2,357.8	$ 2,436.2
Excise taxes	(420.8)	(427.3)	(714.4)	(730.5)
Net sales	986.2	1,005.7	1,643.4	1,705.7
Cost of goods sold	(562.2)	(579.9)	(976.2)	(1,034.7)
Gross profit	424.0	425.8	667.2	671.0
Marketing, general and administrative expenses	(313.6)	(283.3)	(564.5)	(523.9)
Special items, net	(34.5)	(33.7)	74.1	(42.3)
Equity income in MillerCoors	191.9	205.5	334.3	334.8
Operating income (loss)	267.8	314.3	511.1	439.6
Interest income (expense), net	(40.5)	(30.6)	(87.8)	(59.8)
Other income (expense), net	(30.4)	6.3	(45.7)	3.7
Income (loss) from continuing operations before income taxes	196.9	290.0	377.6	383.5
Income tax benefit (expense)	(21.2)	(58.4)	(41.8)	(71.2)
Net Income (loss) from continuing operations	175.7	231.6	335.8	312.3
Income (loss) from discontinued operations, net of tax	(1.8)	(0.3)	(2.3)	1.6
Net income (loss) including noncontrolling interests	173.9	231.3	333.5	313.9
Net (income) loss attributable to noncontrolling interests	(1.6)	(2.3)	(2.4)	(3.8)
Net income (loss) attributable to MCBC	172.3	229.0	331.1	310.1
Comprehensive income (loss) attributable to Molson Coors Brewing Company	36.3	463.6	452.1	(92.7)
Parent Guarantor and 2012 Issuer [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	6.9	6.1	13.5	11.0
Excise taxes	0.0	0.0	0.0	0.0
Net sales	6.9	6.1	13.5	11.0
Cost of goods sold	0.0	0.0	0.0	0.0
Gross profit	6.9	6.1	13.5	11.0
Marketing, general and administrative expenses	(51.1)	(30.3)	(98.1)	(58.4)
Special items, net	0.0	0.0	0.0	0.0
Equity income (loss) in subsidiaries	228.5	184.0	444.3	288.2
Equity income in MillerCoors	0.0	0.0	0.0	0.0
Operating income (loss)	184.3	159.8	359.7	240.8
Interest income (expense), net	(32.8)	(15.9)	(72.7)	(33.1)
Other income (expense), net	(22.0)	0.3	(40.3)	(1.0)
Income (loss) from continuing operations before income taxes	129.5	144.2	246.7	206.7
Income tax benefit (expense)	42.8	84.8	84.4	103.4
Net Income (loss) from continuing operations	172.3	229.0	331.1	310.1
Income (loss) from discontinued operations, net of tax	0.0	0.0	0.0	0.0
Net income (loss) including noncontrolling interests	172.3	229.0	331.1	310.1
Net (income) loss attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to MCBC	172.3	229.0	331.1	310.1
Comprehensive income (loss) attributable to Molson Coors Brewing Company		463.6		(92.7)
Subsidiary Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	590.1	579.0	966.0	1,012.2
Excise taxes	(131.8)	(137.0)	(215.8)	(231.0)
Net sales	458.3	442.0	750.2	781.2
Cost of goods sold	(242.9)	(246.0)	(406.6)	(452.9)
Gross profit	215.4	196.0	343.6	328.3
Marketing, general and administrative expenses	(104.0)	(98.5)	(183.8)	(187.1)
Special items, net	(1.4)	(8.2)	107.9	(8.2)
Equity income (loss) in subsidiaries	(90.9)	(56.3)	(204.3)	(165.4)
Equity income in MillerCoors	191.9	205.5	334.3	334.8
Operating income (loss)	211.0	238.5	397.7	302.4
Interest income (expense), net	71.6	75.3	140.8	148.0
Other income (expense), net	(8.7)	3.4	(4.1)	1.0
Income (loss) from continuing operations before income taxes	273.9	317.2	534.4	451.4
Income tax benefit (expense)	(87.9)	(134.8)	(173.3)	(164.3)
Net Income (loss) from continuing operations	186.0	182.4	361.1	287.1
Income (loss) from discontinued operations, net of tax	0.0	0.0	0.0	0.0
Net income (loss) including noncontrolling interests	186.0	182.4	361.1	287.1
Net (income) loss attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to MCBC	186.0	182.4	361.1	287.1
Comprehensive income (loss) attributable to Molson Coors Brewing Company	46.4	417.5	455.2	(87.9)
Subsidiary Non Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	850.1	852.8	1,445.4	1,447.9
Excise taxes	(289.0)	(290.3)	(498.6)	(499.5)
Net sales	561.1	562.5	946.8	948.4
Cost of goods sold	(352.4)	(332.2)	(622.8)	(604.4)
Gross profit	208.7	230.3	324.0	344.0
Marketing, general and administrative expenses	(165.5)	(161.1)	(296.5)	(290.7)
Special items, net	(33.1)	(25.5)	(33.8)	(34.1)
Equity income (loss) in subsidiaries	87.9	148.8	237.2	189.2
Equity income in MillerCoors	0.0	0.0	0.0	0.0
Operating income (loss)	98.0	192.5	230.9	208.4
Interest income (expense), net	(79.3)	(90.0)	(155.9)	(174.7)
Other income (expense), net	0.3	2.6	(1.3)	3.7
Income (loss) from continuing operations before income taxes	19.0	105.1	73.7	37.4
Income tax benefit (expense)	23.9	(8.4)	47.1	(10.3)
Net Income (loss) from continuing operations	42.9	96.7	120.8	27.1
Income (loss) from discontinued operations, net of tax	(1.8)	(0.3)	(2.3)	1.6
Net income (loss) including noncontrolling interests	41.1	96.4	118.5	28.7
Net (income) loss attributable to noncontrolling interests	(1.6)	(2.3)	(2.4)	(3.8)
Net income (loss) attributable to MCBC	39.5	94.1	116.1	24.9
Comprehensive income (loss) attributable to Molson Coors Brewing Company	(100.4)	242.3	(1.0)	(51.4)
Consolidated [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	1,407.0	1,433.0	2,357.8	2,436.2
Excise taxes	(420.8)	(427.3)	(714.4)	(730.5)
Net sales	986.2	1,005.7	1,643.4	1,705.7
Cost of goods sold	(562.2)	(579.9)	(976.2)	(1,034.7)
Gross profit	424.0	425.8	667.2	671.0
Marketing, general and administrative expenses	(313.6)	(283.3)	(564.5)	(523.9)
Special items, net	(34.5)	(33.7)	74.1	(42.3)
Equity income (loss) in subsidiaries	0.0	0.0	0.0	0.0
Equity income in MillerCoors	191.9	205.5	334.3	334.8
Operating income (loss)	267.8	314.3	511.1	439.6
Interest income (expense), net	(40.5)	(30.6)	(87.8)	(59.8)
Other income (expense), net	(30.4)	6.3	(45.7)	3.7
Income (loss) from continuing operations before income taxes	196.9	290.0	377.6	383.5
Income tax benefit (expense)	(21.2)	(58.4)	(41.8)	(71.2)
Net Income (loss) from continuing operations	175.7	231.6	335.8	312.3
Income (loss) from discontinued operations, net of tax	(1.8)	(0.3)	(2.3)	1.6
Net income (loss) including noncontrolling interests	173.9	231.3	333.5	313.9
Net (income) loss attributable to noncontrolling interests	(1.6)	(2.3)	(2.4)	(3.8)
Net income (loss) attributable to MCBC	172.3	229.0	331.1	310.1
Comprehensive income (loss) attributable to Molson Coors Brewing Company		463.6		(92.7)
Consolidation, Eliminations [Member]
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales	(40.1)	(4.9)	(67.1)	(34.9)
Excise taxes	0.0	0.0	0.0	0.0
Net sales	(40.1)	(4.9)	(67.1)	(34.9)
Cost of goods sold	33.1	(1.7)	53.2	22.6
Gross profit	(7.0)	(6.6)	(13.9)	(12.3)
Marketing, general and administrative expenses	7.0	6.6	13.9	12.3
Special items, net	0.0	0.0	0.0	0.0
Equity income (loss) in subsidiaries	(225.5)	(276.5)	(477.2)	(312.0)
Equity income in MillerCoors	0.0	0.0	0.0	0.0
Operating income (loss)	(225.5)	(276.5)	(477.2)	(312.0)
Interest income (expense), net	0.0	0.0	0.0	0.0
Other income (expense), net	0.0	0.0	0.0	0.0
Income (loss) from continuing operations before income taxes	(225.5)	(276.5)	(477.2)	(312.0)
Income tax benefit (expense)	0.0	0.0	0.0	0.0
Net Income (loss) from continuing operations	(225.5)	(276.5)	(477.2)	(312.0)
Income (loss) from discontinued operations, net of tax	0.0	0.0	0.0	0.0
Net income (loss) including noncontrolling interests	(225.5)	(276.5)	(477.2)	(312.0)
Net (income) loss attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net income (loss) attributable to MCBC	(225.5)	(276.5)	(477.2)	(312.0)
Comprehensive income (loss) attributable to Molson Coors Brewing Company	$ 54.0	$ (659.8)	$ (454.2)	$ 139.3