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REVENUE CAPITALIZED CONTRACTUAL COST (Tables)
 3 Months Ended
Jan. 31, 2020
Capitalized Contract Cost [Line Items]  
Capitalized Contract Cost [Abstract]
The following table provides a roll-forward of our capitalized contract costs, current and non-current:
 
Three Months Ended
 
January 31, 2020
 
January 31, 2019
 
(in millions)
Beginning balance
$
28

 
$
—

Costs capitalized on November 1, 2018 due to ASC 606 adoption
—

 
29

Costs capitalized during the period
16

 
17

Costs amortized during the period
(16
)
 
(18
)
Foreign currency translation impact
—

 
1

Ending balance
$
28

 
$
29