Acquisitions and Other Transactions (Purchase Price Allocations) (Details) - USD ($) $ in Millions			12 Months Ended
	Dec. 31, 2020	Nov. 13, 2020	Dec. 31, 2022	Dec. 31, 2020	Dec. 31, 2021	Nov. 16, 2020	May 28, 2019
Business Acquisition, Date of Acquisition [Abstract]
Goodwill	$ 12,347.0		$ 10,425.8	$ 12,347.0	$ 12,113.7
Cash Acquired from Acquisition	$ 415.8
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill				$ 295.6
Other assets			(7.4)
Deferred tax liabilities			1.0
Upjohn Inc. | Pfizer, Inc.
Business Acquisition, Date of Acquisition [Abstract]
Long-term debt, including current portion						$ 13,080.0
Upjohn Inc.
Business Acquisition, Date of Acquisition [Abstract]
Current assets (excluding inventories and net of cash acquired)			2,803.2		2,841.9
Inventories			2,554.7		2,588.9
Property, plant and equipment			1,389.1		1,394.1
Identified intangible assets		$ 18,040.0	18,040.0		18,040.0
Goodwill		2,400.0	2,403.1		2,107.5
Deferred income tax benefit			1,678.2		1,481.9
Other assets			784.7		792.1
Total assets acquired			29,653.0		29,246.4
Current liabilities			3,179.9		2,760.2
Long-term debt, including current portion			13,076.2		13,076.2
Deferred tax liabilities			1,657.9		1,656.9
Other noncurrent liabilities			1,427.4		1,441.5
Net assets acquired			10,311.6		$ 10,311.6		$ 10,730.0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Current assets (excluding inventories and net of cash acquired)			(38.7)
Inventories		1,430.0	(34.2)
Property, plant and equipment		$ 385.0	(5.0)
Goodwill			295.6
Deferred income tax benefit			196.3
Total assets acquired			406.6
Current liabilities			419.7
Other noncurrent liabilities			(14.1)
Net assets acquired (net of $415.8 of cash acquired)			$ 0.0