STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Beginning Balance	$ (521)		$ (514)
Other comprehensive income (loss) before reclassifications	(27)		(42)
Amounts reclassified out of accumulated other comprehensive income (loss)	11		23
Tax expense (benefit)	(1)		(5)
Other comprehensive income (loss)	(17)	$ (17)	(24)	$ 17
Ending Balance	(538)		(538)
Foreign Currency Translation
Beginning Balance	(215)		(204)
Other comprehensive income (loss) before reclassifications	(29)		(40)
Amounts reclassified out of accumulated other comprehensive income (loss)	0		0
Tax expense (benefit)	0		0
Other comprehensive income (loss)	(29)		(40)
Ending Balance	(244)		(244)
Prior Service Credits
Beginning Balance	128		131
Other comprehensive income (loss) before reclassifications	0		0
Amounts reclassified out of accumulated other comprehensive income (loss)	(2)		(4)
Tax expense (benefit)	1		0
Other comprehensive income (loss)	(1)		(4)
Ending Balance	127		127
Actuarial Losses
Beginning Balance	(431)		(437)
Other comprehensive income (loss) before reclassifications	0		(5)
Amounts reclassified out of accumulated other comprehensive income (loss)	14		28
Tax expense (benefit)	(2)		(5)
Other comprehensive income (loss)	12		18
Ending Balance	(419)		(419)
Unrealized Gains (Losses) on Derivatives
Beginning Balance	(3)		(4)
Other comprehensive income (loss) before reclassifications	2		3
Amounts reclassified out of accumulated other comprehensive income (loss)	(1)		(1)
Tax expense (benefit)	0		0
Other comprehensive income (loss)	1		2
Ending Balance	$ (2)		$ (2)