Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, net, beginning balance			$ 9,867.1
Acquisitions			19.5
Foreign currency translation			(239.7)
Goodwill	$ 9,325.9		9,325.9		$ 9,867.1
Goodwill, Impaired, Accumulated Impairment Loss					(124.0)
Goodwill, Impaired [Abstract]
Goodwill, impairment loss	321.0	$ 0.0	321.0	$ 0.0
Developed Markets Segment
Goodwill [Roll Forward]
Goodwill, net, beginning balance			7,107.4
Acquisitions			19.5
Foreign currency translation			(180.5)
Goodwill	6,946.4		6,946.4		7,107.4
Goodwill, Impaired, Accumulated Impairment Loss	(929.0)		(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			(9.1)
Goodwill	923.7		923.7		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			(31.7)
Goodwill	293.0		293.0		645.7
Goodwill, Impaired, Accumulated Impairment Loss	(351.0)		(351.0)		(30.0)
Emerging Markets Segment
Goodwill [Roll Forward]
Goodwill, net, beginning balance			1,181.2
Acquisitions			0.0
Foreign currency translation			(18.4)
Goodwill	1,162.8		1,162.8		$ 1,181.2
Goodwill, Impaired, Accumulated Impairment Loss	$ (124.0)		(124.0)
Goodwill, Impaired [Abstract]
Goodwill, impairment loss			0.0
Japan, Austalia and New Zealand Segment
Goodwill, Impaired [Abstract]
Goodwill, impairment loss			$ 321.0