PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2012	Oct. 31, 2011
Amounts recognized in balance sheet
Noncurrent asset	$ 20.2	$ 30.4
Pensions
Amounts recognized in balance sheet
Noncurrent asset	20.0	30.0
Current liability	(53)	(60)
Noncurrent liability	(1,784)	(1,343)
Funded status	(1,817)	(1,373)
Amounts recognized in accumulated other comprehensive income - pretax
Net actuarial losses	5,260	4,473
Prior service cost (credit)	105	147
Total	5,365	4,620
Accumulated Benefit Obligations - Additional Disclosures
Accumulated benefit obligation for pension plans	11,181	10,363
Accumulated Benefit Obligations in Excess of Plan Assets
Accumulated benefit obligations for pension plans with accumulated benefit obligations in excess of plan assets	10,987	10,168
Fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets	9,787	9,321
Projected Benefit Obligations in Excess of Plan Assets
Projected benefit obligations for pension plans with projected benefit obligations in excess of plan assets	11,627	10,784
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets	9,790	9,381
Amounts in accumulated other comprehensive income that are expected to be amortized as net expense (income) during fiscal 2013
Net actuarial losses	263
Prior service cost (credit)	33
Total	296
Expected future employer contributions towards defined benefit plans, which include direct benefit payments on unfunded plans	527
Benefits expected to be paid from the benefit plans, which reflect expected future years of service
2013	682
2014	683
2015	680
2016	683
2017	689
2018 to 2022	3,490
Health Care and Life Insurance
Amounts recognized in balance sheet
Current liability	(23)	(23)
Noncurrent liability	(5,713)	(5,170)
Funded status	(5,736)	(5,193)
Amounts recognized in accumulated other comprehensive income - pretax
Net actuarial losses	2,266	2,067
Prior service cost (credit)	(47)	(64)
Total	2,219	2,003
Amounts in accumulated other comprehensive income that are expected to be amortized as net expense (income) during fiscal 2013
Net actuarial losses	147
Prior service cost (credit)	(6)
Total	141
Expected future employer contributions towards defined benefit plans, which include direct benefit payments on unfunded plans	27
Benefits expected to be paid from the benefit plans, which reflect expected future years of service
2013	338
2014	345
2015	356
2016	366
2017	384
2018 to 2022	1,947
Medicare subsidy expected to be received
2013	$ 4

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.