Debt - Schedule of Debt Obligations (Details)	Sep. 30, 2025 USD ($)	Sep. 30, 2025 CAD ($)	Sep. 30, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 EUR (€)
Debt Instrument [Line Items]
Finance leases	$ 72,500,000			$ 66,800,000
Less: unamortized debt discounts and debt issuance costs	(35,800,000)			(38,200,000)
Total long-term debt (including current portion)	6,255,400,000			6,126,200,000
Current portion of long-term debt	2,370,600,000			12,300,000
Total long-term debt	3,884,800,000			6,113,900,000
Short-term borrowings	36,600,000			19,900,000
Current portion of long-term debt and short-term borrowings	2,407,200,000			32,200,000
USD, CAD and GBP Overdraft Facility
Debt Instrument [Line Items]
Revolving credit facility	0			0
EMEA&APAC
Debt Instrument [Line Items]
Overdraft facility	29,500,000			13,000,000.0
Bank cash	75,400,000			59,000,000.0
Bank cash, net of overdrafts	$ 45,900,000			46,000,000.0
CAD 500 million 3.44% senior notes due July 2026
Debt Instrument [Line Items]
Debt instrument, face amount		$ 500,000,000
Debt Instrument, interest rate	3.44%	3.44%	3.44%
$2.0 billion 3.0% senior notes due July 2026
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,000,000,000.0
Debt Instrument, interest rate	3.00%	3.00%	3.00%
EUR 800 million 3.8% notes due 2032
Debt Instrument [Line Items]
Debt instrument, face amount \| €			€ 800,000,000		€ 800,000,000
Debt Instrument, interest rate	3.80%	3.80%	3.80%		3.80%
$1.1 billion 5.0% senior notes due May 2042
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,100,000,000
Debt Instrument, interest rate	5.00%	5.00%	5.00%
$1.8 billion 4.2% senior notes due July 2046
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,800,000,000
Debt Instrument, interest rate	4.20%	4.20%	4.20%
Senior notes \| CAD 500 million 3.44% senior notes due July 2026
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 359,200,000			347,600,000
Senior notes \| $2.0 billion 3.0% senior notes due July 2026
Debt Instrument [Line Items]
Long-term debt, carrying amount	2,000,000,000			2,000,000,000
Senior notes \| EUR 800 million 3.8% notes due 2032
Debt Instrument [Line Items]
Long-term debt, carrying amount	938,700,000			828,300,000
Senior notes \| $1.1 billion 5.0% senior notes due May 2042
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,100,000,000			1,100,000,000
Senior notes \| $1.8 billion 4.2% senior notes due July 2046
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,800,000,000			1,800,000,000
Other
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 20,800,000			$ 21,700,000

MOLSON COORS BEVERAGE CO 10-Q