Goodwill and Other Intangible Assets (Changes in Carrying Amount Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 01, 2021
Goodwill [Line Items]
Goodwill	$ 10,425.8	$ 12,113.7	$ 12,347.0
Goodwill			295.6
Foreign currency translation		(651.2)	(528.9)
Goodwill, Transfers	(919.7)
Impairment of goodwill	(117.0)	0.0	0.0
Goodwill, net, ending balance	10,425.8	12,113.7	12,347.0
Accumulated impairment losses	385.0	385.0	385.0
Developed Markets
Goodwill [Line Items]
Goodwill	7,461.5	8,723.4	9,184.5
Goodwill			67.7
Foreign currency translation		(518.0)	(528.8)
Goodwill, Transfers	(743.9)
Impairment of goodwill	0.0
Goodwill, net, ending balance	7,461.5	8,723.4	9,184.5
Greater China
Goodwill [Line Items]
Goodwill	940.6	969.5	738.3	$ 970.0
Goodwill			220.4
Foreign currency translation		(26.2)	10.8
Goodwill, Transfers	(2.7)
Impairment of goodwill	0.0
Goodwill, net, ending balance	940.6	969.5	738.3
JANZ
Goodwill [Line Items]
Goodwill	689.0	776.3	864.0	780.0
Goodwill			(30.9)
Foreign currency translation		(54.7)	(56.8)
Goodwill, Transfers	(32.6)
Impairment of goodwill	0.0
Goodwill, net, ending balance	689.0	776.3	864.0
Emerging Markets
Goodwill [Line Items]
Goodwill	1,334.7	1,644.5	1,560.2	$ 1,640.0
Goodwill			38.4
Foreign currency translation		(52.3)	45.9
Goodwill, Transfers	(140.5)
Goodwill, net, ending balance	1,334.7	$ 1,644.5	$ 1,560.2
Emerging Markets | Disposal Group, Held-for-sale, Not Discontinued Operations | Upjohn Distributor Markets
Goodwill [Line Items]
Impairment of goodwill	$ (117.0)