Retirement and Post-Retirement Benefit Plans - Schedule of Pension and Post-Retirement Benefit (Credit) Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Amortization and deferrals:
Settlement gain	$ 0	$ (64)	$ 0	$ (64)
U.S. Defined Benefit Plans
Retirement and post-retirement benefit plans
Service cost	0	0	0	0
Interest cost	136	140	408	418
Expected return on plan assets	(183)	(210)	(549)	(644)
Amortization and deferrals:
Actuarial loss (gain)	14	12	42	37
Prior service benefit	0	0	0	0
Net periodic benefit (credit) cost	(33)	(58)	(99)	(189)
Settlement gain	0	(72)	1	(72)
Special termination benefits	0	0	0	0
Plan credit allocation	0	0	0	0
Total periodic benefit (credit) cost from continuing operations	(33)	(130)	(98)	(261)
Summary of total periodic benefit (credit) cost:
Total periodic benefit (credit) cost from continuing operations	(33)	(130)	(98)	(261)
Discontinued operations	0	183	0	193
Total periodic benefit (credit) cost	(33)	53	(98)	(68)
Non-U.S. Defined Benefit Plans
Retirement and post-retirement benefit plans
Service cost	12	64	35	195
Interest cost	6	92	18	280
Expected return on plan assets	(12)	(195)	(36)	(590)
Amortization and deferrals:
Actuarial loss (gain)	6	73	18	220
Prior service benefit	(1)	(4)	(3)	(14)
Net periodic benefit (credit) cost	11	30	32	91
Settlement gain	0	0	1	2
Special termination benefits	0	0	0	8
Plan credit allocation	0	0	0	(11)
Total periodic benefit (credit) cost from continuing operations	11	30	33	90
Summary of total periodic benefit (credit) cost:
Total periodic benefit (credit) cost from continuing operations	11	30	33	90
Discontinued operations	0	26	0	79
Total periodic benefit (credit) cost	11	56	33	169
Post- Retirement Benefit Plans
Retirement and post-retirement benefit plans
Service cost	0	1	0	3
Interest cost	5	7	15	21
Expected return on plan assets	(8)	(10)	(24)	(28)
Amortization and deferrals:
Actuarial loss (gain)	(3)	(2)	(9)	(8)
Prior service benefit	(4)	(5)	(12)	(15)
Net periodic benefit (credit) cost	(10)	(9)	(30)	(27)
Settlement gain	0	0	0	0
Special termination benefits	0	1	9	1
Plan credit allocation	0	(8)	0	(24)
Total periodic benefit (credit) cost from continuing operations	(10)	(16)	(21)	(50)
Summary of total periodic benefit (credit) cost:
Total periodic benefit (credit) cost from continuing operations	(10)	(16)	(21)	(50)
Discontinued operations	0	8	0	24
Total periodic benefit (credit) cost	$ (10)	$ (8)	$ (21)	$ (26)