CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Other comprehensive income (loss), tax, parenthetical disclosures
Unrealized gain (loss) on derivative instruments, tax	$ (4)	$ 2	$ (7)	$ 4
Amounts reclassified into earnings related to derivative instruments, tax	1	(2)	0	(5)
Foreign currency translation, tax	(3)	(1)	4	(8)
Net defined benefit pension cost and post retirement plan costs, tax
Change in actuarial net loss, tax	2	2	9	6
Change in net prior service benefit, tax	$ (1)	$ (1)	$ (7)	$ (4)