LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions	Sep. 30, 2019 USD ($) lawsuits
Plavix Australia Intellectual Property [Member] | Australia, Dollars
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss | $	$ 449.0
Plavix Australia Intellectual Property [Member] | United States of America, Dollars
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss | $	$ 303.0
Byetta Product Liability Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	570
Abilify Product Liability [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	2,000
Securities Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	2
Acquisition of Celgene Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	13
Cercla Matters [Member]
Legal Proceedings And Contingencies [Line Items]
Loss contingency, Estimate of possible loss | $	$ 69.7
BMS [Member] | Acquisition of Celgene Litigation [Member]
Legal Proceedings And Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	5