LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) patents lawsuits
Anti-PD-1 Antibody Patent Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Number of patents | patents	5
Number of scientists	2
Number of scientists employed by a company acquired by Pfizer	1
Eliquis Patent Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Number of patents | patents	2
Number of companies seeking approval of generic Eliquis	25
Plavix Product Liability [Member]
Legal Proceedings And Contingencies [Line Items]
Number of lawsuits	5,000
Number of claims dismissed	3,300
Byetta Product Liability Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Number of lawsuits	500
Number of current plaintiffs	2,000
Abilify Product Liability [Member]
Legal Proceedings And Contingencies [Line Items]
Number of lawsuits	500
Eliquis Product Liability [Member]
Legal Proceedings And Contingencies [Line Items]
Number of claims dismissed	150
Eliquis Product Liability [Member] | United States [Member]
Legal Proceedings And Contingencies [Line Items]
Number of lawsuits	160
Eliquis Product Liability [Member] | Canada [Member]
Legal Proceedings And Contingencies [Line Items]
Number of lawsuits	1
Shareholder Derivative Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Number of lawsuits	3
Number of claims dismissed	3
Litigation settlement amount | $	$ 14.7
Number of appeals	1
Cercla Matters [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, estimate of possible loss | $	$ 62.8
Australia, Dollars | Plavix Australia Intellectual Property [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, estimate of possible loss | $	449.0
United States of America, Dollars | Plavix Australia Intellectual Property [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, estimate of possible loss | $	$ 346.0