Supplemental Guarantor Information Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities		$ 264.4	$ 198.1
Cash flows from investing activities:
Additions to properties		(121.6)	(139.8)
Proceeds from sales of properties and other assets		144.6	7.5
Acquisition of businesses, net of cash acquired		0.0	(51.1)
Investment in MillerCoors		(810.6)	(758.1)
Return of capital from MillerCoors		731.1	692.9
Other		(4.1)	(9.5)
Net cash provided by investing activities		(60.6)	(258.1)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	$ 2,500.0	2,525.9	0.0
Exercise of stock options under equity compensation plans		5.4	28.6
Excess tax benefits from share-based compensation		4.4	7.6
Dividends paid		(176.5)	(152.3)
Payments for purchase of Treasury Stock		0.0	(50.1)
Debt issuance costs		15.0	0.0
Payments on debt and borrowings		(17.9)	(14.6)
Net proceeds from (payments on) revolving credit facilities and commercial paper		2.5	67.2
Change in overdraft balances and other		(3.9)	(39.0)
Net cash provided by (used in) financing activities		2,356.6	(124.7)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents		2,560.4	(184.7)
Effect of foreign exchange rate changes on cash and cash equivalents		(1.0)	(26.1)
Balance at beginning of year	430.9	430.9	624.6
Balance at end of period		2,990.3	413.8
Parent Guarantor and 2012 Issuer [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities		167.4	192.2
Cash flows from investing activities:
Additions to properties		(10.2)	(6.4)
Proceeds from sales of properties and other assets		0.0	0.0
Acquisition of businesses, net of cash acquired			0.0
Investment in MillerCoors		0.0	0.0
Return of capital from MillerCoors		0.0	0.0
Other		0.9	0.0
Net intercompany investing activity		(1.1)	(56.2)
Net cash provided by investing activities		(10.4)	(62.6)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		2,525.9
Exercise of stock options under equity compensation plans		5.4	28.6
Excess tax benefits from share-based compensation		4.4	7.6
Dividends paid		(161.1)	(136.0)
Payments for purchase of Treasury Stock			(50.1)
Debt issuance costs		15.0
Payments on debt and borrowings		0.0	0.0
Proceeds on debt and borrowings		0.0	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper		0.0	64.9
Change in overdraft balances and other		(0.4)	(0.4)
Net intercompany financing activity		0.0	0.0
Net cash provided by (used in) financing activities		2,359.2	(85.4)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents		2,516.2	44.2
Effect of foreign exchange rate changes on cash and cash equivalents		0.0	0.0
Balance at beginning of year	146.4	146.4	40.9
Balance at end of period		2,662.6	85.1
Subsidiary Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities		92.8	252.2
Cash flows from investing activities:
Additions to properties		(35.9)	(40.9)
Proceeds from sales of properties and other assets		142.1	0.5
Acquisition of businesses, net of cash acquired			0.0
Investment in MillerCoors		(810.6)	(758.1)
Return of capital from MillerCoors		731.1	692.9
Other		1.3	(2.4)
Net intercompany investing activity		(39.7)	(173.8)
Net cash provided by investing activities		(11.7)	(281.8)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		0.0
Exercise of stock options under equity compensation plans		0.0	0.0
Excess tax benefits from share-based compensation		0.0	0.0
Dividends paid		(40.3)	(246.3)
Payments for purchase of Treasury Stock			0.0
Debt issuance costs		0.0
Payments on debt and borrowings		0.0	0.0
Proceeds on debt and borrowings		0.0	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper		0.0	0.0
Change in overdraft balances and other		0.0	(0.3)
Net intercompany financing activity		(2.0)	(240.7)
Net cash provided by (used in) financing activities		(38.3)	(5.9)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents		42.8	(35.5)
Effect of foreign exchange rate changes on cash and cash equivalents		3.9	(11.3)
Balance at beginning of year	106.2	106.2	173.2
Balance at end of period		152.9	126.4
Subsidiary Non Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities		44.5	0.0
Cash flows from investing activities:
Additions to properties		(75.5)	(92.5)
Proceeds from sales of properties and other assets		2.5	7.0
Acquisition of businesses, net of cash acquired			(51.1)
Investment in MillerCoors		0.0	0.0
Return of capital from MillerCoors		0.0	0.0
Other		(6.3)	(7.1)
Net intercompany investing activity		(0.9)	(184.5)
Net cash provided by investing activities		(80.2)	(328.2)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		0.0
Exercise of stock options under equity compensation plans		0.0	0.0
Excess tax benefits from share-based compensation		0.0	0.0
Dividends paid		(15.4)	(16.3)
Payments for purchase of Treasury Stock			0.0
Debt issuance costs		0.0
Payments on debt and borrowings		(17.9)	(14.6)
Proceeds on debt and borrowings		31.7	27.9
Net proceeds from (payments on) revolving credit facilities and commercial paper		2.5	2.3
Change in overdraft balances and other		(3.5)	(38.3)
Net intercompany financing activity		(39.7)	(173.8)
Net cash provided by (used in) financing activities		37.1	134.8
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents		1.4	(193.4)
Effect of foreign exchange rate changes on cash and cash equivalents		(4.9)	(14.8)
Balance at beginning of year	178.3	178.3	410.5
Balance at end of period		174.8	202.3
Consolidated [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities		264.4	198.1
Cash flows from investing activities:
Additions to properties		(121.6)	(139.8)
Proceeds from sales of properties and other assets		144.6	7.5
Acquisition of businesses, net of cash acquired			(51.1)
Investment in MillerCoors		(810.6)	(758.1)
Return of capital from MillerCoors		731.1	692.9
Other		(4.1)	(9.5)
Net intercompany investing activity		0.0	0.0
Net cash provided by investing activities		(60.6)	(258.1)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		2,525.9
Exercise of stock options under equity compensation plans		5.4	28.6
Excess tax benefits from share-based compensation		4.4	7.6
Dividends paid		(176.5)	(152.3)
Payments for purchase of Treasury Stock			(50.1)
Debt issuance costs		15.0
Payments on debt and borrowings		(17.9)	(14.6)
Proceeds on debt and borrowings		31.7	27.9
Net proceeds from (payments on) revolving credit facilities and commercial paper		2.5	67.2
Change in overdraft balances and other		(3.9)	(39.0)
Net intercompany financing activity		0.0	0.0
Net cash provided by (used in) financing activities		2,356.6	(124.7)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents		2,560.4	(184.7)
Effect of foreign exchange rate changes on cash and cash equivalents		(1.0)	(26.1)
Balance at beginning of year	430.9	430.9	624.6
Balance at end of period		2,990.3	413.8
Consolidation, Eliminations [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities		(40.3)	(246.3)
Cash flows from investing activities:
Additions to properties		0.0	0.0
Proceeds from sales of properties and other assets		0.0	0.0
Acquisition of businesses, net of cash acquired			0.0
Investment in MillerCoors		0.0	0.0
Return of capital from MillerCoors		0.0	0.0
Other		0.0	0.0
Net intercompany investing activity		41.7	414.5
Net cash provided by investing activities		41.7	414.5
Cash flows from financing activities:
Proceeds from issuance of common stock, net		0.0
Exercise of stock options under equity compensation plans		0.0	0.0
Excess tax benefits from share-based compensation		0.0	0.0
Dividends paid		40.3	246.3
Payments for purchase of Treasury Stock			0.0
Debt issuance costs		0.0
Payments on debt and borrowings		0.0	0.0
Proceeds on debt and borrowings		0.0	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper		0.0	0.0
Change in overdraft balances and other		0.0	0.0
Net intercompany financing activity		41.7	414.5
Net cash provided by (used in) financing activities		(1.4)	(168.2)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents		0.0	0.0
Effect of foreign exchange rate changes on cash and cash equivalents		0.0	0.0
Balance at beginning of year	$ 0.0	0.0	0.0
Balance at end of period		$ 0.0	$ 0.0