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Goodwill (Tables)
 3 Months Ended
Jan. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Allocation and Changes in the Carrying Amount of Goodwill
Goodwill allocated to the Company's reportable segments as of January 31, 2020 and the change in the respective carrying amounts during the three months then ended were as follows:
 
Compute
 
HPC & MCS
 
Storage
 
Intelligent Edge
 
Financial Services
 
Total
 
In millions
Balance at October 31, 2019(1) (2)
$
7,532

 
$
4,478

 
$
4,158

 
$
1,994

 
$
144

 
$
18,306

Goodwill adjustments
—

 
—

 
(1
)
 
—

 
—

 
(1
)
Balance at January 31, 2020(2)
$
7,532

 
$
4,478

 
$
4,157

 
$
1,994

 
$
144

 
$
18,305


 
(1)
As a result of the organizational realignments which were effective as of November 1, 2019, (described in Note 1, "Overview and Summary of Significant Accounting Policies"), goodwill was reallocated to the respective segments as of the beginning of the period using a relative fair value approach.
(2)
Goodwill is net of an accumulated impairment loss of $88 million related to the Corporate Investments segment which was recorded during the fourth quarter of fiscal 2018. There is no remaining goodwill in the Corporate Investments segment.