Goodwill and Intangible Assets (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) right	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Finite-Lived Intangible Assets [Line Items]
In-process research and development	$ 891.6		$ 891.6		$ 319.4
Contingent consideration	540.6		540.6		215.1
Payments			(84.8)
Intangible asset disposal & impairment charges	0.0	$ 0.0	102.0	$ 0.0
Goodwill	9,561.7		9,561.7		9,867.1
Goodwill, Impairment Loss			$ (321.0)	0.0
Number of Reporting Units | right			5
Emerging Markets Segment
Finite-Lived Intangible Assets [Line Items]
Goodwill	1,179.4		$ 1,179.4		1,181.2
Goodwill, After Amortization Expense, Before Reclassification	1,170.0		1,170.0
Goodwill, Impairment Loss			0.0
Japan, Australia and New Zealand Segment
Finite-Lived Intangible Assets [Line Items]
Goodwill	307.4		307.4		645.7
Greater China
Finite-Lived Intangible Assets [Line Items]
Goodwill	932.3		932.3		$ 932.8
Goodwill, After Amortization Expense, Before Reclassification	930.0		930.0
Goodwill, Impairment Loss			0.0
Europe Segment
Finite-Lived Intangible Assets [Line Items]
Goodwill, After Amortization Expense, Before Reclassification	3,860.0		3,860.0
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount	$ 882.0		$ 882.0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	7.90%		7.90%
Europe Segment | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input Term			10 years
Europe Segment | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.100		0.100
Europe Segment | Measurement Input, Reduction in Terminal Year Revenue Growth Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.015		0.015
Europe Segment | Measurement Input, Increase in Discount Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.010		0.010
Europe Segment | Measurement Input, Long-term Revenue Growth Rate
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.025		0.025
Europe Segment | Measurement Input, Terminal Year Revenue Growth Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.020		0.020
Europe Segment | Measurement Input, Estimated Tax Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.157		0.157
Japan, Austalia and New Zealand Segment
Finite-Lived Intangible Assets [Line Items]
Goodwill, After Amortization Expense, Before Reclassification	$ 620.0		$ 620.0
Goodwill, Impairment Loss			$ (321.0)
Japan, Austalia and New Zealand Segment | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input Term			10 years
Japan, Austalia and New Zealand Segment | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.080		0.080
Japan, Austalia and New Zealand Segment | Measurement Input, Reduction in Terminal Year Revenue Growth Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.010		0.010
Japan, Austalia and New Zealand Segment | Measurement Input, Increase in Discount Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.005		0.005
Japan, Austalia and New Zealand Segment | Measurement Input, Long-term Revenue Growth Rate
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.003		0.003
Japan, Austalia and New Zealand Segment | Measurement Input, Terminal Year Revenue Growth Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.010		0.010
Japan, Austalia and New Zealand Segment | Measurement Input, Estimated Tax Rate | Valuation Technique, Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment, Measurement Input	0.303		0.303
North America Segment
Finite-Lived Intangible Assets [Line Items]
Goodwill, After Amortization Expense, Before Reclassification	$ 3,120.0		$ 3,120.0
Reconciling items:
Finite-Lived Intangible Assets [Line Items]
Intangible asset disposal & impairment charges			$ 102.0	$ 32.0