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ACQUISITIONS - Text (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Business Acquisition [Line Items]      
Net revenue $ 5,163 $ 4,914 $ 4,472
Net income 1,071 $ 316 $ 684
Cash payment to acquire business 107    
ACEA Biosciences, Inc. [Member]      
Business Acquisition [Line Items]      
Purchase price for acquisition 250    
BioTek [Member]      
Business Acquisition [Line Items]      
Purchase price for acquisition 1,170    
Net revenue 35    
Net income (12)    
Cash payment to acquire business 470    
Liability incurred to pay for acquisition 700    
Acquisition transaction costs 4    
Estimated costs to complete in-process research and development projects $ 2