CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Sales	$ 11,723.8	$ 13,009.1	$ 13,338.0
Excise taxes	(2,069.8)	(2,429.7)	(2,568.4)
Net Sales	9,654.0	10,579.4	10,769.6
Cost of Goods Sold	(5,885.7)	(6,378.2)	(6,584.8)
Gross profit	3,768.3	4,201.2	4,184.8
Marketing, general and administrative expenses	(2,437.0)	(2,728.0)	(2,802.7)
Special items, net	(1,740.2)	(708.8)	249.7
Operating income (loss)	(408.9)	764.4	1,631.8
Other income (expense), net
Interest expense	274.6	280.9	306.2
Interest income	3.3	8.2	8.0
Total other non-service pension and postretirement benefits (costs), net	30.3	2.9	38.2
Other income (expense), net	6.0	(14.7)	(12.0)
Total other income (expense), net	(235.0)	(284.5)	(272.0)
Income (loss) before income taxes	(643.9)	479.9	1,359.8
Income tax benefit (expense)	(301.8)	(233.7)	(225.2)
Net Income (Loss)	(945.7)	246.2	1,134.6
Net (income) loss attributable to noncontrolling interests	(3.3)	(4.5)	(18.1)
Net income (loss) attributable to Molson Coors Beverage Company	$ (949.0)	$ 241.7	$ 1,116.5
Basic net income (loss) attributable to Molson Coors Beverage Company per share:
Basic net income (loss) attributable to Molson Coors Beverage Company per share (in dollars per share)	$ (4.38)	$ 1.12	$ 5.17
Diluted net income (loss) attributable to Molson Coors Beverage Company per share:
Diluted net income (loss) attributable to Molson Coors Beverage Company per share (in dollars per share)	$ (4.38)	$ 1.11	$ 5.15
Weighted-average shares—basic	216.8	216.6	216.0
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0.0	0.3	0.6
Weighted-average shares for diluted EPS	216.8	216.9	216.6
Common Stock, Dividends, Per Share, Declared	$ 0.57	$ 1.96	$ 1.64
Amounts attributable to Molson Coors Beverage Company
Net income (loss) attributable to Molson Coors Beverage Company	$ (949.0)	$ 241.7	$ 1,116.5
Share-based Payment Arrangement [Member]
Diluted net income (loss) attributable to Molson Coors Beverage Company per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2.7	1.3	0.8