Retirement and Post-Retirement Benefit Plans - Schedule of Pension and Post-Retirement Benefit (Credit) Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Amortization and deferrals:
Settlement loss	$ 3	$ 0	$ 3	$ 0
U.S. Defined Benefit Plans
Retirement and post-retirement benefit plans
Service cost	0	0	0	0
Interest cost	117	136	234	272
Expected return on plan assets	(170)	(183)	(339)	(366)
Amortization and deferrals:
Actuarial loss (gain)	18	14	36	28
Prior service benefit	0	0	0	0
Net periodic benefit (credit) cost	(35)	(33)	(69)	(66)
Settlement loss	3	1	3	1
Special termination benefits	0	0	0	0
Total periodic benefit (credit) cost	(32)	(32)	(66)	(65)
Non-U.S. Defined Benefit Plans
Retirement and post-retirement benefit plans
Service cost	12	12	24	23
Interest cost	4	6	8	12
Expected return on plan assets	(8)	(12)	(16)	(24)
Amortization and deferrals:
Actuarial loss (gain)	10	6	20	12
Prior service benefit	(1)	(1)	(2)	(2)
Net periodic benefit (credit) cost	17	11	34	21
Settlement loss	0	1	0	1
Special termination benefits	0	0	0	0
Total periodic benefit (credit) cost	17	12	34	22
Post-Retirement Benefit Plans
Retirement and post-retirement benefit plans
Service cost	0	0	0	0
Interest cost	5	5	9	10
Expected return on plan assets	(6)	(8)	(12)	(16)
Amortization and deferrals:
Actuarial loss (gain)	(5)	(3)	(7)	(6)
Prior service benefit	(5)	(4)	(10)	(8)
Net periodic benefit (credit) cost	(11)	(10)	(20)	(20)
Settlement loss	0	0	0	0
Special termination benefits	0	9	0	9
Total periodic benefit (credit) cost	$ (11)	$ (1)	$ (20)	$ (11)