CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests	$ 1,008.5	$ (945.7)	$ 246.2
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(28.4)	113.6	177.6
Reclassification of cumulative translation adjustment to income (loss)	7.5	0.0	0.0
Unrealized gain (loss) on derivative instruments	37.4	(85.7)	(84.2)
Reclassification of derivative (gain) loss to income	5.5	(0.4)	0.5
Pension and other postretirement benefit adjustments	118.4	(39.9)	(39.8)
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income and settlement	5.4	(5.2)	19.7
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	15.5	14.2	(10.6)
Total other comprehensive income (loss), net of tax	161.3	(3.4)	63.2
Comprehensive income (loss)	1,169.8	(949.1)	309.4
Comprehensive (income) loss attributable to noncontrolling interests	(2.3)	(5.5)	(5.1)
Comprehensive income (loss) attributable to Molson Coors Beverage Company	$ 1,167.5	$ (954.6)	$ 304.3