Contingencies and Certain Commitments (Product Litigation, Commercial and Other Matters, Resolved Matters) (Details) $ in Millions	1 Months Ended				3 Months Ended
	Oct. 31, 2018 manufacturer	Sep. 30, 2018 lagoon	Nov. 30, 2017 class_action	Mar. 31, 2013 lagoon	Jun. 28, 2020 USD ($)	Sep. 27, 2020 lawsuit
Loss Contingencies [Line Items]
Number of class actions filed | class_action			2
Hormone Therapy Products [Member] | Class Action Versus Wyeth [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Settlement agreed | $					$ 200
Docetaxel [Member] | Pfizer And Hospira And Various Other Manufacturers Versus Mississippi Attorney General [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of defendants other than main defendant | manufacturer	8
Environmental Remediation Litigation [Member]
Loss Contingencies [Line Items]
Number of lagoons | lagoon		2		2
Minimum [Member] | EpiPen [Member]
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit						1