Segment Information (Reconciliation of Segment Information to Total Consolidated Information) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 17,813.6	$ 11,819.9	$ 11,370.3
Segment profitability	(34.0)	(210.8)	715.5
Intangible asset amortization expense	(2,702.2)	(1,605.8)	(1,582.7)
Globally managed research and development costs	(751.1)	(555.1)	(639.9)
Litigation settlements & other contingencies	(329.2)	(107.8)	21.4
Operating Segments
Segment Reporting Information [Line Items]
Net sales	17,813.6	11,819.9
Segment profitability	8,705.0	5,271.6	5,112.3
Segment Reconciling
Segment Reporting Information [Line Items]
Intangible asset amortization expense	(2,702.2)	(1,605.8)	(1,582.7)
Intangible asset impairment charges	(102.8)	(82.4)	(180.6)
Globally managed research and development costs	(751.1)	(555.1)	(639.9)
Litigation settlements & other contingencies	(329.2)	(107.8)	21.4
Transaction related and other special items	(2,832.2)	(1,739.7)	(682.2)
Corporate (Other)
Segment Reporting Information [Line Items]
Corporate costs	(2,021.5)	(1,391.6)	(1,332.8)
Developed Markets \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	10,428.7	8,510.9	8,240.0
Segment profitability	5,143.1	4,243.9	4,137.3
Greater China \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	2,212.8	259.9	214.6
Segment profitability	1,397.1	52.7	89.9
JANZ \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	2,027.4	1,195.3	1,192.5
Segment profitability	762.4	364.6	323.2
Emerging Markets \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	3,144.7	1,853.8	1,723.2
Segment profitability	$ 1,402.4	$ 610.4	$ 561.9

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