STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Beginning Balance	$ (514)
Other comprehensive income (loss) before reclassifications	(15)
Amounts reclassified out of accumulated other comprehensive income (loss)	12
Tax expense (benefit)	(4)
Other comprehensive income (loss)	(7)	$ 34
Ending Balance	(521)
Foreign Currency Translation
Beginning Balance	(204)
Other comprehensive income (loss) before reclassifications	(11)
Amounts reclassified out of accumulated other comprehensive income (loss)	0
Tax expense (benefit)	0
Other comprehensive income (loss)	(11)
Ending Balance	(215)
Prior Service Credits
Beginning Balance	131
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified out of accumulated other comprehensive income (loss)	(2)
Tax expense (benefit)	(1)
Other comprehensive income (loss)	(3)
Ending Balance	128
Actuarial Losses
Beginning Balance	(437)
Other comprehensive income (loss) before reclassifications	(5)
Amounts reclassified out of accumulated other comprehensive income (loss)	14
Tax expense (benefit)	(3)
Other comprehensive income (loss)	6
Ending Balance	(431)
Unrealized Gains (Losses) on Derivatives
Beginning Balance	(4)
Other comprehensive income (loss) before reclassifications	1
Amounts reclassified out of accumulated other comprehensive income (loss)	0
Tax expense (benefit)	0
Other comprehensive income (loss)	1
Ending Balance	$ (3)