Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 22, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-14829
Entity Registrant Name	Molson Coors Beverage Company
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-0178360
Entity Address, Address Line One	P.O. BOX 4030, NH353
Entity Address, City or Town	Golden
Entity Address, State or Province	CO
Entity Address, Country	US
Entity Address, Postal Zip Code	80401
City Area Code	303
Local Phone Number	279-6565
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000024545
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		2,561,670
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		200,296,645
Exchangeable Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		2,718,267
Exchangeable Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		11,104,592
NEW YORK STOCK EXCHANGE | Common Class A
Entity Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $0.01 par value
Trading Symbol	TAP.A
Security Exchange Name	NYSE
NEW YORK STOCK EXCHANGE | Common Class B
Entity Information [Line Items]
Title of 12(b) Security	Class B Common Stock, $0.01 par value
Trading Symbol	TAP
Security Exchange Name	NYSE
1.25% Senior Notes due 2024 | NEW YORK STOCK EXCHANGE
Entity Information [Line Items]
Title of 12(b) Security	1.25% Senior Notes due 2024
Trading Symbol	TAP
Security Exchange Name	NYSE
CANADA
Entity Information [Line Items]
Entity Address, Address Line Two	1555 Notre Dame Street East
Entity Address, City or Town	Montréal
Entity Address, State or Province	QC
Entity Address, Country	CA
Entity Address, Postal Zip Code	H2L 2R5
City Area Code	514
Local Phone Number	521-1786