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REVENUE CONTRACT LIABILITIES (Tables)
 3 Months Ended
Jan. 31, 2020
Revenue Recognition and Deferred Revenue [Abstract]  
Contract with Customer, Asset and Liability [Table Text Block]
The following table provides a roll-forward of our contract liabilities, current and non-current:
 
Three Months Ended
 
January 31, 2020
 
January 31, 2019
 
(in millions)
Balance at October 31
$
510

 
$
461

Impact of adopting new revenue standard
—

 
(64
)
Balance at November 1
510

 
397

Deferral of revenue billed in current period, net of recognition
161

 
167

Revenue recognized that was deferred as of the beginning of the period
(132
)
 
(124
)
Foreign currency translation impact
—

 
3

Balance at January 31
$
539

 
$
443