Segment Information (Reconciliation Of Segment Information To Total Consolidated Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Net sales	$ 3,569.0	$ 3,785.9	$ 6,812.2	$ 7,439.4
Other revenues	13.1	10.7	24.2	20.6
Revenues	3,582.1	3,796.6	6,836.4	7,460.0
Earnings (loss) from operations	233.0	(239.9)	(2,649.2)	(36.0)
Intangible asset amortization expense	(583.3)	(597.2)	(1,154.5)	(1,198.2)
Intangible asset (including IPR&D) disposal & impairment charges	(2.2)	(102.0)	(2.2)	(102.0)
Impairment of goodwill	0.0	(321.0)	(2,936.8)	(321.0)
Research and development	(218.8)	(204.1)	(440.8)	(403.8)
Other Research and Development Refund	0.0	7.8	(10.0)	1.7
Litigation settlements and other contingencies, net	47.6	(131.0)	121.1	(207.8)
Operating Segment
Segment Reporting Information [Line Items]
Cost of sales	1,489.2	1,563.2	2,865.5	3,055.5
Selling, general and administration	493.8	542.3	950.8	1,067.0
Earnings (loss) from operations	1,599.1	1,691.1	3,020.1	3,337.5
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting Information [Line Items]
Intangible asset amortization expense	(583.3)	(597.2)	(1,154.5)	(1,198.2)
Intangible asset (including IPR&D) disposal & impairment charges	(2.2)	(102.0)	(2.2)	(102.0)
Research and development	(218.8)	(204.1)	(440.8)	(403.8)
Litigation settlements and other contingencies, net	47.6	(131.0)	121.1	(207.8)
Other One-Time Nonoperating Expense	(212.8)	(196.4)	(469.3)	(398.7)
Corporate / Other
Segment Reporting Information [Line Items]
Corporate costs	396.6	387.1	776.8	743.7
Developed Markets Segment
Segment Reporting Information [Line Items]
Revenues	2,129.6	2,325.1	4,028.2	4,497.7
Impairment of goodwill			(2,261.0)
Developed Markets Segment | Product and Service, Other
Segment Reporting Information [Line Items]
Other revenues	10.3	5.9	17.2	13.1
Developed Markets Segment | Operating Segment
Segment Reporting Information [Line Items]
Net sales	2,119.3	2,319.2	4,011.0	4,484.6
Cost of sales	1,004.6	1,025.1	1,930.8	2,001.5
Selling, general and administration	249.5	292.3	483.8	575.2
Earnings (loss) from operations	875.5	1,007.7	1,613.6	1,921.0
Greater China
Segment Reporting Information [Line Items]
Revenues	588.9	539.4	1,144.4	1,083.3
Impairment of goodwill			0.0
Greater China | Product and Service, Other
Segment Reporting Information [Line Items]
Other revenues	0.0	0.4	0.0	0.4
Greater China | Operating Segment
Segment Reporting Information [Line Items]
Net sales	588.9	539.0	1,144.4	1,082.9
Cost of sales	62.5	59.2	123.3	120.4
Selling, general and administration	124.6	130.8	234.6	247.2
Earnings (loss) from operations	401.8	349.4	786.5	715.7
Japan, Australia and New Zealand Segment
Segment Reporting Information [Line Items]
Revenues	306.7	349.8	583.8	667.9
Impairment of goodwill		(321.0)	(300.8)
Japan, Australia and New Zealand Segment | Product and Service, Other
Segment Reporting Information [Line Items]
Other revenues	1.0	0.2	2.0	0.5
Japan, Australia and New Zealand Segment | Operating Segment
Segment Reporting Information [Line Items]
Net sales	305.7	349.6	581.8	667.4
Cost of sales	181.7	207.3	358.2	396.7
Selling, general and administration	41.3	41.2	79.7	82.6
Earnings (loss) from operations	83.7	101.3	145.9	188.6
Emerging Markets Segment
Segment Reporting Information [Line Items]
Revenues	556.9	582.3	1,080.0	1,211.1
Impairment of goodwill			(375.0)
Emerging Markets Segment | Product and Service, Other
Segment Reporting Information [Line Items]
Other revenues	1.8	4.2	5.0	6.6
Emerging Markets Segment | Operating Segment
Segment Reporting Information [Line Items]
Net sales	555.1	578.1	1,075.0	1,204.5
Cost of sales	240.4	271.6	453.2	536.9
Selling, general and administration	78.4	78.0	152.7	162.0
Earnings (loss) from operations	$ 238.1	$ 232.7	$ 474.1	$ 512.2