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REVENUE - Revenue by Region (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Disaggregation of Revenue [Line Items]      
Net revenue $ 6,319 $ 5,339 $ 5,163
Americas      
Disaggregation of Revenue [Line Items]      
Net revenue 2,404 1,968 1,861
Europe      
Disaggregation of Revenue [Line Items]      
Net revenue 1,688 1,443 1,441
Asia Pacific      
Disaggregation of Revenue [Line Items]      
Net revenue 2,227 1,928 1,861
Life Sciences and Applied Markets      
Disaggregation of Revenue [Line Items]      
Net revenue 2,823 2,392 2,302
Life Sciences and Applied Markets | Americas      
Disaggregation of Revenue [Line Items]      
Net revenue 951 784 692
Life Sciences and Applied Markets | Europe      
Disaggregation of Revenue [Line Items]      
Net revenue 658 540 551
Life Sciences and Applied Markets | Asia Pacific      
Disaggregation of Revenue [Line Items]      
Net revenue 1,214 1,068 1,059
Diagnostics and Genomics      
Disaggregation of Revenue [Line Items]      
Net revenue 1,296 1,047 1,021
Diagnostics and Genomics | Americas      
Disaggregation of Revenue [Line Items]      
Net revenue 695 517 505
Diagnostics and Genomics | Europe      
Disaggregation of Revenue [Line Items]      
Net revenue 417 371 368
Diagnostics and Genomics | Asia Pacific      
Disaggregation of Revenue [Line Items]      
Net revenue 184 159 148
Agilent CrossLab      
Disaggregation of Revenue [Line Items]      
Net revenue 2,200 1,900 1,840
Agilent CrossLab | Americas      
Disaggregation of Revenue [Line Items]      
Net revenue 758 667 664
Agilent CrossLab | Europe      
Disaggregation of Revenue [Line Items]      
Net revenue 613 532 522
Agilent CrossLab | Asia Pacific      
Disaggregation of Revenue [Line Items]      
Net revenue $ 829 $ 701 $ 654