PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 5) (Health Care and Life Insurance, USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2012	Oct. 31, 2011
Health Care and Life Insurance
Health care costs trend rates
Weighted average composite trend rate for first fiscal year following balance sheet date (as a percent)	7.10%	7.30%
Ultimate weighted-average composite trend rate (as a percent)	5.00%	5.00%
Year that weighted-average composite trend rate reaches ultimate rate (year)	2018	2017
The changes in the accumulated postretirement benefit obligation and the aggregate of service and interest cost components of net periodic postretirement benefits cost due to one percentage point change in the assumed health care cost trend rate
Increase in accumulated postretirement benefit obligations due to one percentage point increase in the assumed health care cost trend rate	$ 955
Increase in aggregate of service and interest cost components of net periodic postretirement benefits cost for the year due to one percentage point increase in the assumed health care cost trend rate	50
Decrease in accumulated postretirement benefit obligations due to one percentage point decrease in the assumed health care cost trend rate	723
Decrease in aggregate of service and interest cost components of net periodic postretirement benefits cost for the year due to one percentage point decrease in the assumed health care cost trend rate	$ 38

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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The ultimate trend rate for health care costs.

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