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REVENUE Contract with customers, assets and liabilities (Tables)
12 Months Ended
Oct. 31, 2020
Revenue from Contract with Customer [Abstract]  
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Changes in contract liabilities, current and non-current, during 2020 were as follows:
 
Year Ended
 
October 31, 2020
 
(in millions)
Balance at October 31, 2019
$
510

Deferral of revenue billed in current period, net of recognition
377

Deferred revenue arising out of acquisitions
10

Revenue recognized that was deferred as of the beginning of the period
(336
)
Foreign currency translation impact
5

Balance at October 31, 2020
$
566