Supplemental Guarantor Information Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	$ (118.3)	$ (88.3)
Cash flows from investing activities:
Additions to properties	(180.0)	(71.1)
Proceeds from sales of properties and other assets	42.0	2.4
Investment in MillerCoors	0.0	(413.7)
Return of capital from MillerCoors	0.0	283.4
Other	5.9	(6.5)
Net cash provided by investing activities	(132.1)	(205.5)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	0.0	2,526.4
Exercise of stock options under equity compensation plans	0.3	4.2
Dividends paid	(88.3)	(88.3)
Debt issuance costs	(3.7)	(14.2)
Payments on debt and borrowings	(1,501.1)	(10.3)
Proceeds on debt and borrowings	1,536.0	20.9
Net proceeds from (payments on) revolving credit facilities and commercial paper	131.0	2.5
Change in overdraft balances and other	6.1	17.3
Net cash provided by (used in) financing activities	80.3	2,458.5
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(170.1)	2,164.7
Effect of foreign exchange rate changes on cash and cash equivalents	4.2	7.3
Balance at beginning of year	560.9	430.9
Balance at end of period	395.0	2,602.9
Parent Company [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	(172.4)	(157.1)
Cash flows from investing activities:
Additions to properties	(3.8)	(7.2)
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	0.0	0.0
Net cash provided by investing activities	(3.8)	(7.2)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		2,526.4
Exercise of stock options under equity compensation plans	0.3	4.2
Dividends paid	(80.8)	(80.5)
Debt issuance costs	(3.7)	(14.2)
Payments on debt and borrowings	(1,500.0)	0.0
Proceeds on debt and borrowings	1,536.0	0.0
Net proceeds from (payments on) revolving credit facilities and commercial paper	129.9	0.0
Change in overdraft balances and other	(10.9)	(1.5)
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	70.8	2,434.4
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(105.4)	2,270.1
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	41.9	2,416.5
Subsidiary Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	141.5	147.5
Cash flows from investing activities:
Additions to properties	(142.1)	(21.5)
Proceeds from sales of properties and other assets	0.2	1.3
Investment in MillerCoors		(413.7)
Return of capital from MillerCoors		283.4
Other	0.0	0.0
Net intercompany investing activity	(42.6)	(66.1)
Net cash provided by investing activities	(184.5)	(216.6)
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	0.0	0.0
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	(7.7)	0.0
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	(7.7)	0.0
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(50.7)	(69.1)
Effect of foreign exchange rate changes on cash and cash equivalents	0.6	4.7
Balance at beginning of year	141.5	106.2
Balance at end of period	91.4	41.8
Subsidiary Non Guarantors [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	(87.4)	(78.7)
Cash flows from investing activities:
Additions to properties	(34.1)	(42.4)
Proceeds from sales of properties and other assets	41.8	1.1
Investment in MillerCoors		0.0
Return of capital from MillerCoors		0.0
Other	5.9	(6.5)
Net intercompany investing activity	0.0	0.0
Net cash provided by investing activities	13.6	(47.8)
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	(7.5)	(7.8)
Debt issuance costs	0.0	0.0
Payments on debt and borrowings	(1.1)	(10.3)
Proceeds on debt and borrowings	0.0	20.9
Net proceeds from (payments on) revolving credit facilities and commercial paper	1.1	2.5
Change in overdraft balances and other	24.7	18.8
Net intercompany financing activity	42.6	66.1
Net cash provided by (used in) financing activities	59.8	90.2
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(14.0)	(36.3)
Effect of foreign exchange rate changes on cash and cash equivalents	3.6	2.6
Balance at beginning of year	272.1	178.3
Balance at end of period	261.7	144.6
Consolidated [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	(118.3)	(88.3)
Cash flows from investing activities:
Additions to properties	(180.0)	(71.1)
Proceeds from sales of properties and other assets	42.0	2.4
Investment in MillerCoors		(413.7)
Return of capital from MillerCoors		283.4
Other	5.9	(6.5)
Net intercompany investing activity	0.0	0.0
Net cash provided by investing activities	(132.1)	(205.5)
Cash flows from financing activities:
Proceeds from issuance of common stock, net		2,526.4
Exercise of stock options under equity compensation plans	0.3	4.2
Dividends paid	(88.3)	(88.3)
Debt issuance costs	(3.7)	(14.2)
Payments on debt and borrowings	(1,501.1)	(10.3)
Proceeds on debt and borrowings	1,536.0	20.9
Net proceeds from (payments on) revolving credit facilities and commercial paper	131.0	2.5
Change in overdraft balances and other	6.1	17.3
Net intercompany financing activity	0.0	0.0
Net cash provided by (used in) financing activities	80.3	2,458.5
Cash and cash equivalents:
Net increase (decrease) in cash and cash equivalents	(170.1)	2,164.7
Effect of foreign exchange rate changes on cash and cash equivalents	4.2	7.3
Balance at beginning of year	560.9	430.9
Balance at end of period	395.0	2,602.9
Consolidation, Eliminations [Member]
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Net cash provided by operating activities	0.0	0.0
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	42.6	66.1
Net cash provided by investing activities	42.6	66.1
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	0.0	0.0
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	(42.6)	(66.1)
Net cash provided by (used in) financing activities	(42.6)	(66.1)
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