CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income (loss) including noncontrolling interests	$ (2,936.9)	$ 228.8	$ (2,389.5)	$ 864.0
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(78.1)	104.8	246.1	(23.0)
Unrealized gain (loss) recognized on derivative instruments	1.1	(28.6)	(23.2)	1.3
Derivative instrument activity reclassified from other comprehensive income (loss)	0.0	0.0	(0.4)	0.0
Net change in pension and other postretirement benefit assets and liabilities recognized in other comprehensive income (loss)	0.0	14.4	0.0	14.4
Pension and other postretirement activity reclassified from other comprehensive income (loss)	(1.3)	23.3	(4.4)	19.7
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0.1	0.1	0.2	0.3
Total other comprehensive income (loss), net of tax	(78.2)	114.0	218.3	12.7
Comprehensive income (loss)	(3,015.1)	342.8	(2,171.2)	876.7
Comprehensive (income) loss attributable to noncontrolling interests	9.3	(29.3)	10.6	(29.4)
Comprehensive income (loss) attributable to Molson Coors Beverage Company	$ (3,005.8)	$ 313.5	$ (2,160.6)	$ 847.3