Supplemental Guarantor Information Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	$ 1,145.4	$ 630.2
Cash flows from investing activities:
Additions to properties	(466.0)	(188.9)
Proceeds from sales of properties and other assets	56.9	155.4
Investment in MillerCoors	0.0	(1,253.7)
Return of capital from MillerCoors	0.0	1,089.7
Other	11.1	8.6
Net cash provided by (used in) investing activities	(398.0)	(188.9)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	0.0	2,525.6
Exercise of stock options under equity compensation plans	3.6	8.2
Dividends paid	(264.9)	(264.6)
Debt issuance costs	(7.0)	(60.2)
Payments on debt and borrowings	(2,601.5)	(23.3)
Proceeds on debt and borrowings	1,536.0	6,971.9
Net proceeds from (payments on) revolving credit facilities and commercial paper	999.7	1.6
Change in overdraft balances and other	(33.7)	(39.1)
Net cash provided by (used in) financing activities	(367.8)	9,120.1
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	379.6	9,561.4
Effect of foreign exchange rate changes on cash and cash equivalents	30.8	(10.8)
Balance at beginning of year	560.9	430.9
Balance at end of period	971.3	9,981.5
Parent Company [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	531.2	728.4
Cash flows from investing activities:
Additions to properties	(12.3)	(12.0)
Proceeds from sales of properties and other assets	0.0	0.0
Investment in MillerCoors		0.0
Return of capital from MillerCoors		0.0
Other	0.0	1.5
Net intercompany investing activity	49.6	(1,771.2)
Net cash provided by (used in) investing activities	37.3	(1,781.7)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		2,525.6
Exercise of stock options under equity compensation plans	3.6	8.2
Dividends paid	(242.9)	(241.8)
Debt issuance costs	(7.0)	(55.7)
Payments on debt and borrowings	(2,600.0)	0.0
Proceeds on debt and borrowings	1,536.0	6,167.6
Net proceeds from (payments on) revolving credit facilities and commercial paper	1,003.9	0.0
Change in overdraft balances and other	(12.7)	(17.4)
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	(319.1)	8,386.5
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	249.4	7,333.2
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Balance at beginning of year	147.3	146.4
Balance at end of period	396.7	7,479.6
Subsidiary Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	650.8	(29.2)
Cash flows from investing activities:
Additions to properties	(341.4)	(60.6)
Proceeds from sales of properties and other assets	3.7	142.1
Investment in MillerCoors		(1,253.7)
Return of capital from MillerCoors		1,089.7
Other	0.4	2.3
Net intercompany investing activity	(69.6)	(1,590.9)
Net cash provided by (used in) investing activities	(406.9)	(1,671.1)
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
Dividends paid	(497.5)	(40.3)
Debt issuance costs	0.0	(4.5)
Payments on debt and borrowings	0.0	0.0
Proceeds on debt and borrowings	0.0	768.8
Net proceeds from (payments on) revolving credit facilities and commercial paper	0.0	0.0
Change in overdraft balances and other	(10.8)	0.0
Net intercompany financing activity	296.7	3,119.8
Net cash provided by (used in) financing activities	(211.6)	3,843.8
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	32.3	2,143.5
Effect of foreign exchange rate changes on cash and cash equivalents	4.3	(3.2)
Balance at beginning of year	141.5	106.2
Balance at end of period	178.1	2,246.5
Subsidiary Non Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	574.7	(28.7)
Cash flows from investing activities:
Additions to properties	(112.3)	(116.3)
Proceeds from sales of properties and other assets	53.2	13.3
Investment in MillerCoors		0.0
Return of capital from MillerCoors		0.0
Other	10.7	4.8
Net intercompany investing activity	(347.3)	(1,348.6)
Net cash provided by (used in) investing activities	(395.7)	(1,446.8)
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
Dividends paid	(135.8)	(22.8)
Debt issuance costs	0.0	0.0
Payments on debt and borrowings	(1.5)	(23.3)
Proceeds on debt and borrowings	0.0	35.5
Net proceeds from (payments on) revolving credit facilities and commercial paper	(4.2)	1.6
Change in overdraft balances and other	(10.2)	(21.7)
Net intercompany financing activity	70.6	1,590.9
Net cash provided by (used in) financing activities	(81.1)	1,560.2
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	97.9	84.7
Effect of foreign exchange rate changes on cash and cash equivalents	26.5	(7.6)
Balance at beginning of year	272.1	178.3
Balance at end of period	396.5	255.4
Consolidated [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	1,145.4	630.2
Cash flows from investing activities:
Additions to properties	(466.0)	(188.9)
Proceeds from sales of properties and other assets	56.9	155.4
Investment in MillerCoors		(1,253.7)
Return of capital from MillerCoors		1,089.7
Other	11.1	8.6
Net intercompany investing activity	0.0	0.0
Net cash provided by (used in) investing activities	(398.0)	(188.9)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		2,525.6
Exercise of stock options under equity compensation plans	3.6	8.2
Dividends paid	(264.9)	(264.6)
Debt issuance costs	(7.0)	(60.2)
Payments on debt and borrowings	(2,601.5)	(23.3)
Proceeds on debt and borrowings	1,536.0	6,971.9
Net proceeds from (payments on) revolving credit facilities and commercial paper	999.7	1.6
Change in overdraft balances and other	(33.7)	(39.1)
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	(367.8)	9,120.1
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	379.6	9,561.4
Effect of foreign exchange rate changes on cash and cash equivalents	30.8	(10.8)
Balance at beginning of year	560.9	430.9
Balance at end of period	971.3	9,981.5
Consolidation, Eliminations [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	(611.3)	(40.3)
Cash flows from investing activities:
Additions to properties	0.0	0.0
Proceeds from sales of properties and other assets	0.0	0.0
Investment in MillerCoors		0.0
Return of capital from MillerCoors		0.0
Other	0.0	0.0
Net intercompany investing activity	367.3	4,710.7
Net cash provided by (used in) investing activities	367.3	4,710.7
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
Dividends paid	611.3	40.3
Debt issuance costs	0.0	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	(367.3)	(4,710.7)
Net cash provided by (used in) financing activities	244.0	(4,670.4)
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
Balance at end of period	$ 0.0	$ 0.0