REVENUE Contract with customers, assets and liabilities (Tables)

12 Months Ended

Oct. 31, 2019

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

Changes in contract liabilities, current and non-current, during 2019 were as follows:

	Year Ended
	October 31, 2019
	(in millions)
Balance at October 31, 2018	$	461
Impact of adopting new revenue standard	(64		)
Balance at November 1, 2018	397
Deferred revenue arising out of acquisitions	1
Deferral of revenue billed in current period, net of recognition	386
Revenue recognized that was deferred as of the beginning of the period	(274		)
Balance at October 31, 2019	$	510