Contingencies and Certain Commitments (Patent Litigation) (Details) - Patent Infringement [Member]	1 Months Ended					3 Months Ended
	Jan. 31, 2020 Patents	Mar. 31, 2019 Patents	Jun. 30, 2018 Patents	Oct. 31, 2017 Patents	Mar. 31, 2017 Patents	Apr. 30, 2017 Patents Defendant
Gain Contingencies [Line Items]
Number of patents which the Patent Trial and Appeal Board refused to initiate proceedings				2
Judicial Ruling [Member]
Gain Contingencies [Line Items]
Number of patents infringed upon			1
Pfizer Versus Generic Companies [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon		2
Pfizer Versus Viwit Pharmaceutical Co. Ltd. [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon	3
Xeljanz [Member] | Pfizer Versus Zydus [Member] | Pending Litigation [Member]
Gain Contingencies [Line Items]
Number of patents allegedly infringed upon					3
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