Supplemental Guarantor Information Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statements of Cash Flows
Net cash provided by (used in) operating activities	$ 1,866.3	$ 1,126.9	$ 715.9
Cash flows from investing activities:
Additions to properties	(599.6)	(341.8)	(275.0)
Proceeds from sales of properties and other assets	60.5	174.5	11.8
Acquisition of businesses, net of cash acquired	0.0	(11,961.0)	(91.2)
Investment in MillerCoors	0.0	(1,253.7)	(1,442.7)
Return of capital from MillerCoors	0.0	1,086.9	1,441.1
Payments for (Proceeds from) Other Investing Activities	0.9	8.5	21.3
Net cash used in investing activities	(538.2)	(12,286.6)	(334.7)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock	0.0	2,525.6	0.0
Exercise of stock options under equity compensation plans	4.0	11.2	34.6
Dividends paid	(353.4)	(352.9)	(303.4)
Payments for purchase of treasury stock	0.0	0.0	(150.1)
Payments on debt and borrowings	(3,000.1)	(223.9)	(701.4)
Proceeds on debt and borrowings	1,536.0	9,460.6	703.3
Debt issuance costs	(7.0)	(60.7)	(61.8)
Net proceeds from (payments on) revolving credit facilities and commercial paper	374.3	(1.1)	3.9
Change in overdraft balances and other	(50.2)	(40.9)	(56.6)
Net Cash Provided by (Used in) Financing Activities	(1,496.4)	11,317.9	(531.5)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(168.3)	158.2	(150.3)
Effect of foreign exchange rate changes on cash and cash equivalents	26.0	(28.2)	(43.4)
Balance at beginning of year	560.9	430.9	624.6
Balance at end of year	418.6	560.9	430.9
Parent Issuer
Consolidated Statements of Cash Flows
Net cash provided by (used in) operating activities	792.5	666.6	598.1
Cash flows from investing activities:
Additions to properties	(12.1)	(14.3)	(13.9)
Proceeds from sales of properties and other assets	0.0	0.0	0.0
Acquisition of businesses, net of cash acquired		0.0	0.0
Investment in MillerCoors		0.0	0.0
Return of capital from MillerCoors		0.0	0.0
Other	72.1	(11,260.0)	(56.3)
Payments for (Proceeds from) Other Investing Activities	0.0	0.0	33.4
Net cash used in investing activities	60.0	(11,274.3)	(36.8)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock		2,525.6
Exercise of stock options under equity compensation plans	4.0	11.2	34.6
Dividends paid	(324.0)	(322.2)	(271.7)
Payments for purchase of treasury stock			(150.1)
Payments on debt and borrowings	(2,600.0)	(200.0)	0.0
Proceeds on debt and borrowings	1,536.0	8,667.6	0.0
Debt issuance costs	(7.0)	(56.2)	(58.3)
Net proceeds from (payments on) revolving credit facilities and commercial paper	378.5	0.0	0.0
Change in overdraft balances and other	(12.9)	(17.4)	(10.3)
Net intercompany financing activity	32.2	0.0	0.0
Net Cash Provided by (Used in) Financing Activities	(993.2)	10,608.6	(455.8)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(140.7)	0.9	105.5
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Balance at beginning of year	147.3	146.4	40.9
Balance at end of year	6.6	147.3	146.4
Subsidiary Guarantors
Consolidated Statements of Cash Flows
Net cash provided by (used in) operating activities	1,474.7	579.4	691.8
Cash flows from investing activities:
Additions to properties	(428.6)	(164.1)	(70.2)
Proceeds from sales of properties and other assets	4.4	159.0	0.7
Acquisition of businesses, net of cash acquired		(11,972.6)	0.0
Investment in MillerCoors		(1,253.7)	(1,442.7)
Return of capital from MillerCoors		1,086.9	1,441.1
Other	21.1	(1,429.1)	(134.2)
Payments for (Proceeds from) Other Investing Activities	0.4	1.9	(10.7)
Net cash used in investing activities	(402.7)	(13,571.7)	(216.0)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock		0.0
Exercise of stock options under equity compensation plans	0.0	0.0	0.0
Dividends paid	(809.5)	(355.7)	(306.5)
Payments for purchase of treasury stock			0.0
Payments on debt and borrowings	(398.4)	(0.2)	(676.4)
Proceeds on debt and borrowings	0.0	768.8	679.9
Debt issuance costs	0.0	(4.5)	(3.5)
Net proceeds from (payments on) revolving credit facilities and commercial paper	0.0	0.0	0.0
Change in overdraft balances and other	(11.1)	0.0	(0.5)
Net intercompany financing activity	149.1	12,624.9	(214.4)
Net Cash Provided by (Used in) Financing Activities	(1,069.9)	13,033.3	(521.4)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	2.1	41.0	(45.6)
Effect of foreign exchange rate changes on cash and cash equivalents	(2.7)	(5.7)	(21.4)
Balance at beginning of year	141.5	106.2	173.2
Balance at end of year	140.9	141.5	106.2
Subsidiary Non Guarantors
Consolidated Statements of Cash Flows
Net cash provided by (used in) operating activities	818.5	245.3	(220.4)
Cash flows from investing activities:
Additions to properties	(158.9)	(163.4)	(190.9)
Proceeds from sales of properties and other assets	56.1	15.5	11.1
Acquisition of businesses, net of cash acquired		11.6	(91.2)
Investment in MillerCoors		0.0	0.0
Return of capital from MillerCoors		0.0	0.0
Other	(254.4)	(1,425.7)	270.7
Payments for (Proceeds from) Other Investing Activities	0.5	6.6	(1.4)
Net cash used in investing activities	(356.7)	(1,555.4)	(1.7)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock		0.0
Exercise of stock options under equity compensation plans	0.0	0.0	0.0
Dividends paid	(439.3)	(39.4)	(78.8)
Payments on debt and borrowings	(1.7)	(23.7)	(25.0)
Proceeds on debt and borrowings	0.0	24.2	23.4
Debt issuance costs	0.0	0.0	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	(4.2)	(1.1)	3.9
Change in overdraft balances and other	(26.2)	(23.5)	(45.8)
Net intercompany financing activity	(20.1)	1,489.9	134.2
Net Cash Provided by (Used in) Financing Activities	(491.5)	1,426.4	11.9
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(29.7)	116.3	(210.2)
Effect of foreign exchange rate changes on cash and cash equivalents	28.7	(22.5)	(22.0)
Balance at beginning of year	272.1	178.3	410.5
Balance at end of year	271.1	272.1	178.3
Consolidated [Member]
Consolidated Statements of Cash Flows
Net cash provided by (used in) operating activities	1,866.3	1,126.9	715.9
Cash flows from investing activities:
Additions to properties	(599.6)	(341.8)	(275.0)
Proceeds from sales of properties and other assets	60.5	174.5	11.8
Acquisition of businesses, net of cash acquired		(11,961.0)	(91.2)
Investment in MillerCoors		(1,253.7)	(1,442.7)
Return of capital from MillerCoors		1,086.9	1,441.1
Other	0.0	0.0	0.0
Payments for (Proceeds from) Other Investing Activities	0.9	8.5	21.3
Net cash used in investing activities	(538.2)	(12,286.6)	(334.7)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock		2,525.6
Exercise of stock options under equity compensation plans	4.0	11.2	34.6
Dividends paid	(353.4)	(352.9)	(303.4)
Payments for purchase of treasury stock			(150.1)
Payments on debt and borrowings	(3,000.1)	(223.9)	(701.4)
Proceeds on debt and borrowings	1,536.0	9,460.6	703.3
Debt issuance costs	(7.0)	(60.7)	(61.8)
Net proceeds from (payments on) revolving credit facilities and commercial paper	374.3	(1.1)	3.9
Change in overdraft balances and other	(50.2)	(40.9)	(56.6)
Net intercompany financing activity	0.0	0.0	0.0
Net Cash Provided by (Used in) Financing Activities	(1,496.4)	11,317.9	(531.5)
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(168.3)	158.2	(150.3)
Effect of foreign exchange rate changes on cash and cash equivalents	26.0	(28.2)	(43.4)
Balance at beginning of year	560.9	430.9	624.6
Balance at end of year	418.6	560.9	430.9
Eliminations
Consolidated Statements of Cash Flows
Net cash provided by (used in) operating activities	(1,219.4)	(364.4)	(353.6)
Cash flows from investing activities:
Additions to properties	0.0	0.0	0.0
Proceeds from sales of properties and other assets	0.0	0.0	0.0
Acquisition of businesses, net of cash acquired		0.0	0.0
Investment in MillerCoors		0.0	0.0
Return of capital from MillerCoors		0.0	0.0
Other	161.2	14,114.8	(80.2)
Payments for (Proceeds from) Other Investing Activities	0.0	0.0	0.0
Net cash used in investing activities	161.2	14,114.8	(80.2)
Cash flows from financing activities:
Proceeds from Issuance of Common Stock		0.0
Exercise of stock options under equity compensation plans	0.0	0.0	0.0
Dividends paid	1,219.4	364.4	353.6
Payments for purchase of treasury stock			0.0
Payments on debt and borrowings	0.0	0.0	0.0
Proceeds on debt and borrowings	0.0	0.0	0.0
Debt issuance costs	0.0	0.0	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	0.0	0.0	0.0
Change in overdraft balances and other	0.0	0.0	0.0
Net intercompany financing activity	(161.2)	(14,114.8)	80.2
Net Cash Provided by (Used in) Financing Activities	1,058.2	(13,750.4)	433.8
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	0.0	0.0	0.0
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0	0.0
Balance at beginning of year	0.0	0.0	0.0
Balance at end of year	$ 0.0	$ 0.0	$ 0.0