GOODWILL AND OTHER INTANGIBLE ASSETS
 3 Months Ended
Jan. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND OTHER INTANGIBLE ASSETS
8. GOODWILL AND OTHER INTANGIBLE ASSETS
 
The following table presents goodwill balances and the movements for each of our reportable segments during the three months ended January 31, 2015:
 
 
Life Sciences and Applied Markets
 
Diagnostics and Genomics
 
Agilent CrossLab
 
Total
 
(in millions)
Goodwill as of October 31, 2014
$
668

 
$
1,345

 
$
494

 
$
2,507

Foreign currency translation impact
(11
)
 
(136
)
 
(8
)
 
(155
)
Goodwill as of January 31, 2015
$
657

 
$
1,209

 
$
486

 
$
2,352

 
The components of other intangibles as of January 31, 2015 and October 31, 2014 are shown in the table below:
 
 
Purchased Other Intangible Assets
 
Gross
Carrying
Amount
 
Accumulated
Amortization
and
Impairments
 
Net Book
Value
 
(in millions)
As of October 31, 2014:
 

 
 

 
 

Purchased technology
$
880

 
$
475

 
$
405

Trademark/Tradename
167

 
52

 
115

Customer relationships
368

 
257

 
111

Total amortizable intangible assets
1,415

 
784

 
631

In-Process R&D
18

 
—

 
18

Total
$
1,433

 
$
784

 
$
649

As of January 31, 2015:
 

 
 

 
 

Purchased technology
848

 
503

 
345

Trademark/Tradename
157

 
55

 
102

Customer relationships
362

 
269

 
93

Total amortizable intangible assets
1,367

 
827

 
540

In-Process R&D
19

 
—

 
19

Total
$
1,386

 
$
827

 
$
559

 
During the three months ended January 31, 2015, there were no additions to goodwill and there were no additions to other intangible assets. During the three months ended January 31, 2015, other intangible assets decreased $47 million, due to the impact of foreign exchange translation.
 
During the three months ended January 31, 2014, there were no additions to goodwill or to other intangible assets. We also transferred $4 million from in-process R&D to purchased technology in the three months ended January 31, 2014, as projects were completed.

Amortization of intangible assets was $43 million and $49 million for the three months ended January 31, 2015 and 2014, respectively. Future amortization expense related to existing finite-lived purchased intangible assets is estimated to be $115 million for the remainder of 2015, $133 million for 2016, $93 million for 2017, $61 million for 2018, $46 million for 2019, $36 million for 2020, and $56 million thereafter.