Retirement and Post-Retirement Benefit Plans - Summary of Net Benefit Cost (Details) - Benefit Plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Non-U.S. Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 37	$ 50	$ 107	$ 150
Interest cost	54	78	156	236
Expected return on plan assets	(138)	(165)	(402)	(496)
Amortization and deferrals:
Actuarial loss (gain)	61	56	201	165
Prior service benefit	(4)	(5)	(12)	(14)
Net periodic benefit cost	10	14	50	41
Settlement loss	6	1	9	2
Special termination benefits	1	1	3	4
Plan expense allocation	0	(4)	(15)	(8)
Net benefit cost from continuing operations	17	12	47	39
Discontinued operations	0	25	79	65
Net benefit cost	17	37	126	104
Post-Retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1	1	3	3
Interest cost	1	2	3	6
Expected return on plan assets	0	(1)	0	(2)
Amortization and deferrals:
Actuarial loss (gain)	(1)	(1)	(3)	(3)
Prior service benefit	0	0	0	0
Net periodic benefit cost	1	1	3	4
Settlement loss	0	0	0	0
Special termination benefits	0	0	0	0
Plan expense allocation	0	0	(1)	0
Net benefit cost from continuing operations	1	1	2	4
Discontinued operations	0	0	1	0
Net benefit cost	$ 1	$ 1	$ 3	$ 4