Contingencies and Certain Commitments (Product Litigation, Commercial and Other Matters, Resolved Matters) (Details) $ in Millions	1 Months Ended				3 Months Ended	7 Months Ended
	Oct. 31, 2018 manufacturer	Sep. 30, 2018 lagoon	Nov. 30, 2017 classAction	Mar. 31, 2013 lagoon	Jun. 28, 2020 USD ($)	Dec. 31, 2020 lawsuit classAction
Pfizer And Hospira And Various Other Manufacturers Versus Mississippi Attorney General [Member] \| Docetaxel [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of defendants other than main defendant \| manufacturer	8
Array Securities Litigation [Member]
Loss Contingencies [Line Items]
Number of class actions filed			2
Zantac/Ranitidine NDMA Litigation [Member]
Loss Contingencies [Line Items]
Number of class actions filed						2
Class Action Versus Wyeth [Member] \| Hormone Therapy Products [Member] \| Settled Litigation [Member]
Loss Contingencies [Line Items]
Payments for legal settlements \| $					$ 200
Environmental Remediation Litigation [Member]
Loss Contingencies [Line Items]
Feasibility study, number of lagoons \| lagoon		2		2
Minimum [Member] \| Epi Pen [Member]
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit						1