Retirement and Post-Retirement Benefit Plans - Schedule of Pension and Post-Retirement Benefit (Credit) Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Post-Retirement Benefit Plans
Retirement and post-retirement benefit plans
Service cost	$ 0	$ 0
Interest cost	4	4
Expected return on plan assets	(6)	(6)
Amortization and deferrals:
Actuarial loss (gain)	(4)	(2)
Prior service benefit	(5)	(5)
Net periodic (credit) benefit cost	(11)	(9)
Settlement loss	0	0
Total periodic benefit (credit) cost	(11)	(9)
U.S. | Defined Benefit Plans
Retirement and post-retirement benefit plans
Service cost	0	0
Interest cost	113	117
Expected return on plan assets	(181)	(169)
Amortization and deferrals:
Actuarial loss (gain)	15	18
Prior service benefit	0	0
Net periodic (credit) benefit cost	(53)	(34)
Settlement loss	1	0
Total periodic benefit (credit) cost	(52)	(34)
Non-U.S. | Defined Benefit Plans
Retirement and post-retirement benefit plans
Service cost	14	12
Interest cost	6	4
Expected return on plan assets	(10)	(8)
Amortization and deferrals:
Actuarial loss (gain)	7	10
Prior service benefit	(1)	(1)
Net periodic (credit) benefit cost	16	17
Settlement loss	0	0
Total periodic benefit (credit) cost	$ 16	$ 17