PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Pensions
Defined Benefit Plan Disclosure
Service cost	$ 61	$ 67
Interest cost	119	110
Expected return on plan assets	(193)	(194)
Amortization of actuarial (gain) loss	43	65
Amortization of prior service cost (credit)	6	8
Settlements/curtailments	2
Net cost	38	56
Defined benefit plan employer contributions	22
Defined benefit plan employer contributions expected for the remainder of the fiscal year	70
Health Care and Life Insurance
Defined Benefit Plan Disclosure
Service cost	11	14
Interest cost	66	64
Expected return on plan assets	(18)	(21)
Amortization of actuarial (gain) loss	9	36
Amortization of prior service cost (credit)	(1)	(1)
Net cost	67	92
Defined benefit plan employer contributions	7
Defined benefit plan employer contributions expected for the remainder of the fiscal year	$ 19