Acquisitions and Other Transactions (Purchase Price Allocations) (Details) - USD ($) $ in Millions			12 Months Ended
	Dec. 31, 2020	Nov. 13, 2020	Dec. 31, 2021	Dec. 31, 2020	Nov. 16, 2020	Dec. 31, 2019	May 28, 2019
Business Acquisition, Date of Acquisition [Abstract]
Goodwill	$ 12,347.0		$ 12,113.7	$ 12,347.0		$ 9,590.6
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)	2,841.9		2,803.2	2,841.9
Inventories	2,588.9		2,554.7	2,588.9
Property, plant and equipment	1,394.1		1,389.1	1,394.1
Identified intangible assets	18,040.0	$ 18,040.0	18,040.0	18,040.0
Goodwill	2,107.5	2,400.0	2,403.1	2,107.5
Deferred income tax benefit	1,481.9		1,678.2	1,481.9
Other assets	792.1		784.7	792.1
Total assets acquired	29,246.4		29,653.0	29,246.4
Current liabilities	2,760.2		3,179.9	2,760.2
Long-term debt, including current portion	13,076.2		13,076.2	13,076.2
Deferred tax liabilities	1,656.9		1,657.9	1,656.9
Other noncurrent liabilities	1,441.5		1,427.4	1,441.5
Net assets acquired	$ 10,311.6		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