PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Pensions
Change in Benefit Obligations
Beginning of year balance	$ (10,197)	$ (9,708)
Service cost	(197)	(176)	(124)
Interest cost	(492)	(510)	(563)
Actuarial gains (losses)	(656)	(517)
Amendments	(9)	(14)
Benefits paid	648	681
Early-retirement benefits			4
Settlements/curtailments	1	17
Foreign exchange and other	(23)	30
End of year balance	(10,925)	(10,197)	(9,708)
Change in Plan Assets (Fair Value)
Beginning of year balance	9,504	8,401
Actual return on plan assets	600	1,054
Employer contribution	79	763
Benefits paid	(648)	(681)
Settlements	(1)	(17)
Foreign exchange and other	18	(16)
End of year balance	9,552	9,504	8,401
Funded status	(1,373)	(693)
Weighted-Average Assumptions
Discount rates (as a percent)	4.40%	5.00%
Rate of compensation increase (as a percent)	3.90%	3.90%
Health Care and Life Insurance
Change in Benefit Obligations
Beginning of year balance	(6,467)	(6,318)
Service cost	(44)	(44)	(28)
Interest cost	(326)	(337)	(344)
Actuarial gains (losses)	(113)	(69)
Benefits paid	340	325
Health care subsidy receipts	(14)	(15)
Early-retirement benefits			1
Foreign exchange and other	(28)	(9)
End of year balance	(6,652)	(6,467)	(6,318)
Change in Plan Assets (Fair Value)
Beginning of year balance	1,637	1,666
Actual return on plan assets	95	219
Employer contribution	43	73
Benefits paid	(340)	(325)
Foreign exchange and other	24	4
End of year balance	1,459	1,637	1,666
Funded status	$ (5,193)	$ (4,830)
Weighted-Average Assumptions
Discount rates (as a percent)	4.40%	5.20%