Restructuring and Impairments - Restructuring Reserve by Type (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Jul. 31, 2017	Jan. 31, 2017	Jul. 31, 2016	Jul. 31, 2014	Jul. 31, 2017	Jul. 31, 2016	Oct. 31, 2016	Oct. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (13)		$ 5		$ (4)	$ 11
Restructuring Reserve	10		12		10	12	$ 7	$ 68
Restructuring and Related Cost, Incurred Cost					15	4
Payments for Restructuring					(12)	(62)
Restructuring Reserve, Accrual Adjustment					0	2
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	9		10		9	10	5	62
Restructuring and Related Cost, Incurred Cost					15	4
Payments for Restructuring					(11)	(58)
Restructuring Reserve, Accrual Adjustment					0	2
Lease Vacancy [Member] [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0		1		0	1	1	5
Restructuring and Related Cost, Incurred Cost					0	0
Payments for Restructuring					(1)	(4)
Restructuring Reserve, Accrual Adjustment					0	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1		$ 1		1	1	$ 1	$ 1
Restructuring and Related Cost, Incurred Cost					0	0
Payments for Restructuring					0	0
Restructuring Reserve, Accrual Adjustment					$ 0	$ 0
Other Postretirement Benefit Plan [Member] | Chatham [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Postemployment Benefits, Period Expense	23	$ 6		$ 14
Other Postretirement Benefit Plan [Member] | Melrose Park [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Postemployment Benefits, Period Expense	41
Other Postretirement Benefit Plan [Member] | Melrose Park [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Postemployment Benefits, Period Expense	10
Other Postretirement Benefit Plan [Member] | Melrose Park [Member] | Defined Benefit Plan Remeasurement [Domain]
Restructuring Cost and Reserve [Line Items]
Postemployment Benefits, Period Expense	$ 2