Contingencies and Certain Commitments (Actions In Which We Are The Plaintiff) (Details)		1 Months Ended									3 Months Ended		12 Months Ended
	Mar. 29, 2020 Patents	Mar. 29, 2020 Patents	Jan. 31, 2020 Patents	Mar. 31, 2019 Patents	Dec. 31, 2018 Patents	Jun. 30, 2018 Patents	Jan. 31, 2018 Patents	Oct. 31, 2017 Patents	Mar. 31, 2017 Patents	Aug. 31, 2015 Patents	Mar. 29, 2020 Patents	Apr. 30, 2017 Patents Defendant	Dec. 31, 2014 Patents
Precedex Premix [Member] | Hospira Versus Amneal Pharmaceuticals LLC [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly not infringed upon													1
Precedex Premix [Member] | Hospira Versus Amneal Pharmaceuticals LLC [Member] | Settled Litigation [Member]
Gain Contingencies [Line Items]
Number of patents infringed upon							1
Number of allegedly not infringed upon patents due to expire March 2019				1
Number of patents not infringed upon							3
Precedex Premix [Member] | Hospira Versus Fresenius Kabj USA LLC [Member] | Settled Litigation [Member]
Gain Contingencies [Line Items]
Number of patents not infringed upon	2				2
Number of patents found not infringed upon subsequently appealed											1
Precedex Premix [Member] | Hospira Versus Par [Member] | Settled Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly not infringed upon							4			4
Precedex Premix [Member] | Hospira Versus Par Steril Products, LLC, Gland Pharma Limited And Jiangsu Hengrui Medicine Co. [Member] | Settled Litigation [Member]
Gain Contingencies [Line Items]
Number of patents not infringed upon		3
Patent Infringement [Member]
Gain Contingencies [Line Items]
Number of patents which the Patent Trial and Appeal Board refused to initiate proceedings								2
Patent Infringement [Member] | Judicial Ruling [Member]
Gain Contingencies [Line Items]
Number of patents infringed upon						1
Patent Infringement [Member] | Pfizer Versus Ajanta [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon				2
Patent Infringement [Member] | Pfizer Versus Generic Companies [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon				2
Patent Infringement [Member] | Pfizer Versus Viwit Pharmaceutical Co. Ltd. [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon			3
Patent Infringement [Member] | Xeljanz [Member] | Pfizer Versus Zydus [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon									3
Patent Infringement [Member] | Eliquis [Member] | Pfizer and BMS Versus Several Generic Manufacturers [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon												3
Number of defendants | Defendant												25
Number of patents allegedly infringed upon due to expire December 2019												1