This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460

Segment Reporting Income (Loss) From Continuing Operations (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 30, 2019	Sep. 30, 2019	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting
Goodwill, Impairment Loss				$ 1,484.3	$ 674.4
Net Sales				9,654.0	10,579.4	$ 10,769.6
Interest expense				(274.6)	(280.9)	(306.2)
Interest income				3.3	8.2	8.0
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
Total special items				1,740.2	708.8	(249.7)
North America [Member]
Segment Reporting
Goodwill, Impairment Loss		$ 668.3		0.0	668.3
Segment Reconciling Items [Member]
Segment Reporting
Unrealized Gain (Loss) on Commodity Contracts				107.6	(0.8)	(166.2)
Sale of Montreal Brewery
Segment Reporting
Proceeds from Sale of Property, Plant, and Equipment	$ 96.2
Sale and Leaseback Transaction, Gain (Loss), Net	$ 61.3
Acquisition purchase price adjustment settlement gain [Member]
Segment Reporting
Unusual or Infrequent Item, or Both, Gain, Gross			$ 328.0
North America [Member]
Segment Reporting
Net Sales				8,237.0	8,618.2	8,724.4
Interest expense				(2.6)	2.8	8.8
Interest income				0.2	0.0	0.0
Income (loss) before income taxes				1,080.5	645.0	1,661.9
Europe [Member]
Segment Reporting
Net Sales				1,431.9	1,986.4	2,070.4
Interest expense				(5.7)	(6.2)	(5.6)
Interest income				0.3	0.5	0.5
Income (loss) before income taxes				(1,603.7)	102.4	128.6
Unallocated [Member]
Segment Reporting
Net Sales				0.0	0.0	0.0
Interest expense				(266.3)	(277.5)	(309.4)
Interest income				2.8	7.7	7.5
Income (loss) before income taxes				(120.7)	(267.5)	(430.7)
Eliminations
Segment Reporting
Net Sales				(14.9)	(25.2)	(25.2)
Interest expense				0.0	0.0	0.0
Interest income				0.0	0.0	0.0
Income (loss) before income taxes				$ 0.0	0.0	0.0
International
Segment Reporting
Goodwill, Impairment Loss		$ 6.1
Selling, General and Administrative Expenses [Member] \| Millercoors [Member]
Segment Reporting
Business Combination, Acquisition Related Costs					$ 25.0	$ 38.8