Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 9,975.6
Accumulated impairment losses, beginning balance	(385.0)
Foreign currency translation	226.7
Goodwill, net, beginning balance	9,590.6
Accumulated impairment losses, ending balance	(385.0)
Goodwill, gross, ending balance	10,202.3
Goodwill, net, ending balance	9,590.6	$ 9,817.3
North America Segment
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	3,708.4
Accumulated impairment losses, beginning balance	(385.0)
Foreign currency translation	33.8
Goodwill, net, beginning balance	3,323.4
Accumulated impairment losses, ending balance	(385.0)
Goodwill, gross, ending balance	3,742.2
Goodwill, net, ending balance	3,323.4	3,357.2
Europe Segment
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	4,548.6
Accumulated impairment losses, beginning balance	0.0
Foreign currency translation	197.5
Goodwill, net, beginning balance	4,548.6
Accumulated impairment losses, ending balance	0.0
Goodwill, gross, ending balance	4,746.1
Goodwill, net, ending balance	4,548.6	4,746.1
Rest of World Segment
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,718.6
Accumulated impairment losses, beginning balance	0.0
Foreign currency translation	(4.6)
Goodwill, net, beginning balance	1,718.6
Accumulated impairment losses, ending balance	0.0
Goodwill, gross, ending balance	1,714.0
Goodwill, net, ending balance	$ 1,718.6	$ 1,714.0