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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
 9 Months Ended
Jul. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill balances and movements for each reportable segment during the period
The following table presents goodwill balances and the movements for each of our reportable segments during the nine months ended July 31, 2021:
 
 Life Sciences and Applied MarketsDiagnostics and GenomicsAgilent CrossLabTotal
 (in millions)
Goodwill as of October 31, 2020$1,441 $1,599 $562 $3,602 
Foreign currency translation impact5 2 2 9 
Goodwill arising from acquisitions and adjustments— 365 — 365 
Goodwill as of July 31, 2021$1,446 $1,966 $564 $3,976 
Components of other intangible assets during the period
The component parts of other intangible assets as of July 31, 2021 and October 31, 2020 are shown in the table below:
 
 Other Intangible Assets
 Gross
Carrying
Amount		Accumulated
Amortization		Net Book
Value
 (in millions)
As of October 31, 2020   
Purchased technology$1,429 $863 $566 
Trademark/Tradename196 117 79 
Customer relationships330 158 172 
Third-party technology and licenses11 7 4 
Total amortizable intangible assets1,966 1,145 821 
In-Process R&D10 — 10 
Total$1,976 $1,145 $831 
As of July 31, 2021   
Purchased technology$1,741 $944 $797 
Trademark/Tradename196 129 67 
Customer relationships357 210 147 
Backlog8 2 6 
Third-party technology and licenses11 7 4 
Total amortizable intangible assets2,313 1,292 1,021 
In-Process R&D11 — 11 
Total$2,324 $1,292 $1,032 
Schedule of estimated future amortization expense of finite-lived intangible assets
Future amortization expense related to existing finite-lived purchased intangible assets for the remainder of fiscal year 2021 and for each of the next five fiscal years and thereafter is estimated below:
Estimated future amortization expense:
(in millions)
Remainder of 2021$51 
2022$191 
2023$143 
2024$121 
2025$96 
2026$66 
Thereafter$353