PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Pensions
Change in benefit obligations
Beginning of year balance	$ (11,834)	$ (10,925)
Service cost	(273)	(220)	(197)
Interest cost	(439)	(465)	(492)
Actuarial gain (loss)	951	(947)
Amendments	26	(5)
Benefits paid	655	656
Settlements/curtailments	3	10
Foreign exchange and other	(57)	62
End of year balance	(10,968)	(11,834)	(10,925)
Change in plan assets (fair value)
Beginning of year balance	10,017	9,552
Actual return on plan assets	1,312	736
Employer contribution	301	441
Benefits paid	(655)	(656)
Settlements	(3)	(10)
Foreign exchange and other	36	(46)
End of year balance	11,008	10,017	9,552
Funded status	40	(1,817)
Weighted-average assumptions
Discount rates (as a percent)	4.50%	3.80%
Rate of compensation increase (as a percent)	3.80%	3.90%
Health Care and Life Insurance
Change in benefit obligations
Beginning of year balance	(7,023)	(6,652)
Service cost	(58)	(49)	(44)
Interest cost	(255)	(281)	(326)
Actuarial gain (loss)	1,092	(347)
Amendments	2	(2)
Benefits paid	329	333
Health care subsidies	(16)	(15)
Foreign exchange and other	3	(10)
End of year balance	(5,926)	(7,023)	(6,652)
Change in plan assets (fair value)
Beginning of year balance	1,287	1,459
Actual return on plan assets	158	113
Employer contribution	37	37
Benefits paid	(329)	(333)
Foreign exchange and other	4	11
End of year balance	1,157	1,287	1,459
Funded status	$ (4,769)	$ (5,736)
Weighted-average assumptions
Discount rates (as a percent)	4.70%	3.80%