STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Beginning Balance	$ (310)		$ (346)
Other comprehensive income (loss), before reclassifications	(30)		(10)
Amounts reclassified out of accumulated other comprehensive income (loss)	9		29
Tax (expense) benefit	(4)		(8)
Other comprehensive income (loss)	(25)	$ 60	11	$ 86
Ending Balance	(335)		(335)
Foreign currency translation
Beginning balance	(130)		(156)
Other comprehensive income (loss) before reclassifications	(39)		(13)
Amounts reclassified out of accumulated other comprehensive income (loss)	0		0
Tax (expense) benefit	0	(6)	0	(6)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(39)	57	(13)	61
Ending balance	(169)		(169)
Prior service credits
Beginning balance	137		140
Other comprehensive income (loss) before reclassifications	0		0
Amounts reclassified out of accumulated other comprehensive income (loss)	(2)	(2)	(6)	(7)
Tax (expense) benefit	1		2
Other comprehensive income (loss)	(1)	(1)	(4)	(4)
Ending balance	136		136
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Actuarial Gain (Loss), before Tax
Beginning balance	(315)		(328)
Other comprehensive income (loss) before reclassifications	1		0
Amounts reclassified out of accumulated other comprehensive income (loss)	10	12	29	46
Tax (expense) benefit	(3)		(8)
Other comprehensive income (loss)	8	$ 8	21	$ 34
Ending balance	(307)		(307)
Unrealized gains (losses) on derivatives
Beginning balance	(2)		(2)
Other comprehensive income (loss) before reclassifications	8		3
Amounts reclassified out of accumulated other comprehensive income (loss)	1		6
Tax (expense) benefit	(2)		(2)
Other comprehensive income (loss)	7		7
Ending balance	$ 5		$ 5