LEGAL PROCEEDINGS AND CONTINGENCIES (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) lawsuits
Anti-PD-1 Antibody Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number	6
Eliquis Patent Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number	2
Loss Contingency, Number of Plaintiffs	25
Plavix Australia Intellectual Property [Member] | Australia, Dollars
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss	$ 449,000,000
Plavix Australia Intellectual Property [Member] | United States of America, Dollars
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss	$ 276,000,000
Abilify Product Liability [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number | lawsuits	212
Byetta Product Liability Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number | lawsuits	584
Securities Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number | lawsuits	2
Cercla Matters [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss	$ 69,400,000
Upfront, milestone and other licensing receipts [Member] | CAR T Kite Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss	585,000,000
Royalty [Member] | CAR T Kite Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss	$ 0.276