Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, net, beginning balance	$ 9,867.1
Acquisitions	19.5
Foreign currency translation	(3.9)
Goodwill	9,561.7		$ 9,867.1
Goodwill, Impaired, Accumulated Impairment Loss			(124.0)
Goodwill, Impaired [Abstract]
Goodwill, impairment loss	321.0	$ 0.0
Developed Markets Segment
Goodwill [Roll Forward]
Goodwill, net, beginning balance	7,107.4
Acquisitions	19.5
Foreign currency translation	15.7
Goodwill	7,142.6		7,107.4
Goodwill, Impaired, Accumulated Impairment Loss	(929.0)		(929.0)
Goodwill, Impaired [Abstract]
Goodwill, impairment loss	0.0
Greater China
Goodwill [Roll Forward]
Goodwill, net, beginning balance	932.8
Acquisitions	0.0
Foreign currency translation	(0.5)
Goodwill	932.3		932.8
Goodwill, Impaired [Abstract]
Goodwill, impairment loss	0.0
Japan, Australia and New Zealand Segment
Goodwill [Roll Forward]
Goodwill, net, beginning balance	645.7
Acquisitions	0.0
Foreign currency translation	(17.3)
Goodwill	307.4		645.7
Goodwill, Impaired, Accumulated Impairment Loss	(351.0)		(30.0)
Emerging Markets Segment
Goodwill [Roll Forward]
Goodwill, net, beginning balance	1,181.2
Acquisitions	0.0
Foreign currency translation	(1.8)
Goodwill	1,179.4		$ 1,181.2
Goodwill, Impaired, Accumulated Impairment Loss	(124.0)
Goodwill, Impaired [Abstract]
Goodwill, impairment loss	0.0
Japan, Austalia and New Zealand Segment
Goodwill, Impaired [Abstract]
Goodwill, impairment loss	$ 321.0