CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income (loss) including noncontrolling interests	$ (2,180.2)	$ 1,157.7	$ 956.4
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	290.4	(306.1)	98.7
Cumulative translation adjustment reclassified from other comprehensive income (loss)	0.0	0.0	(0.6)
Unrealized gain (loss) recognized on derivative instruments	(14.6)	53.2	(2.5)
Derivative instrument activity reclassified from other comprehensive income (loss)	(0.8)	(0.2)	0.9
Net change in pension and other postretirement benefit assets and liabilities recognized in other comprehensive income (loss)	21.1	(7.3)	(6.4)
Pension and other postretirement activity reclassified from other comprehensive income (loss)	(5.5)	17.6	(11.2)
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	1.2	(0.4)	11.2
Total other comprehensive income (loss), net of tax	291.8	(243.2)	90.1
Comprehensive income (loss)	(1,888.4)	914.5	1,046.5
Comprehensive (income) loss attributable to noncontrolling interests	39.6	(34.7)	(8.4)
Comprehensive income (loss) attributable to Molson Coors Beverage Company	$ (1,848.8)	$ 879.8	$ 1,038.1