Goodwill and Intangible Assets Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible assets subject to amortization:
Accumulated amortization	$ (995.1)	$ (810.3)
Intangible assets not subject to amortization:
Total Gross	14,651.1	14,586.7
Total Net	13,656.0	13,776.4
Goodwill	7,631.4	8,260.8	$ 8,405.5
Brands
Intangible assets subject to amortization:
Gross	5,036.3	4,988.0
Accumulated amortization	(865.1)	(682.4)
Net	4,171.2	4,305.6
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 8,172.4	$ 8,169.9
Brands | Minimum
Intangible assets subject to amortization:
Useful life	10 years	10 years
Brands | Maximum
Intangible assets subject to amortization:
Useful life	50 years	50 years
License agreements and distribution rights
Intangible assets subject to amortization:
Gross	$ 202.0	$ 220.2
Accumulated amortization	(90.6)	(95.7)
Net	$ 111.4	$ 124.5
License agreements and distribution rights | Minimum
Intangible assets subject to amortization:
Useful life	15 years	15 years
License agreements and distribution rights | Maximum
Intangible assets subject to amortization:
Useful life	28 years	28 years
Distribution networks
Intangible assets subject to amortization:
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 778.8	$ 741.8
Other Intangible Assets [Member]
Intangible assets subject to amortization:
Gross	124.0	129.2
Accumulated amortization	(39.4)	(32.2)
Net	84.6	97.0
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 337.6	$ 337.6
Other Intangible Assets [Member] | Minimum
Intangible assets subject to amortization:
Useful life	2 years	2 years
Other Intangible Assets [Member] | Maximum
Intangible assets subject to amortization:
Useful life	40 years	40 years
Canada
Intangible assets not subject to amortization:
Goodwill	$ 218.1	$ 856.6	$ 932.1
Canada | Coors Light Brand Distribution Rights [Member]
Intangible assets not subject to amortization:
Percentage Of Fair Value Exceeding Carrying Value	11.00%