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REVENUE CAPITALIZED CONTRACTUAL COST (Tables)
6 Months Ended
Apr. 30, 2019
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:
 
Six Months Ended
 
April 30, 2019
 
(in millions)
Balance at October 31, 2018
$

Costs capitalized on November 1, 2018 due to ASC 606 adoption
29

Costs capitalized during the period
33

Costs amortized during the period
(36
)
Balance at April 30, 2019
$
26