PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2014	Oct. 31, 2013
Amounts recognized in balance sheet
Noncurrent asset	$ 262.0	$ 551.1
Pensions
Amounts recognized in balance sheet
Noncurrent asset	262.0	551.0
Current liability	(51)	(58)
Noncurrent liability	(954)	(453)
Funded status	(743)	40
Amounts recognized in accumulated other comprehensive income - pretax
Net actuarial loss	4,266	3,512
Prior service cost (credit)	42	67
Total	4,308	3,579
Accumulated Benefit Obligations - Additional Disclosures
Accumulated benefit obligation for pension plans	11,425	10,352
Accumulated Benefit Obligations in Excess of Plan Assets
Accumulated benefit obligations for pension plans with accumulated benefit obligations in excess of plan assets	1,381	680
Fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets	916	267
Projected Benefit Obligations in Excess of Plan Assets
Projected benefit obligations for pension plans with projected benefit obligations in excess of plan assets	8,213	1,340
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets	7,208	829
Amounts in accumulated other comprehensive income that are expected to be amortized as net expense (income) during fiscal 2015
Net actuarial loss	222
Prior service cost (credit)	25
Total	247
Expected future employer contributions towards defined benefit plans, which are primarily direct benefit payments for unfunded plans	78
Benefits expected to be paid from the benefit plans, which reflect expected future years of service
2015	677
2016	670
2017	677
2018	682
2019	684
2020 to 2024	3,485
Health Care and Life Insurance
Amounts recognized in balance sheet
Current liability	(21)	(21)
Noncurrent liability	(5,326)	(4,748)
Funded status	(5,347)	(4,769)
Amounts recognized in accumulated other comprehensive income - pretax
Net actuarial loss	1,675	960
Prior service cost (credit)	(407)	(41)
Total	1,268	919
Amounts in accumulated other comprehensive income that are expected to be amortized as net expense (income) during fiscal 2015
Net actuarial loss	93
Prior service cost (credit)	(77)
Total	16
Expected future employer contributions towards defined benefit plans, which are primarily direct benefit payments for unfunded plans	26
Benefits expected to be paid from the benefit plans, which reflect expected future years of service
2015	327
2016	334
2017	350
2018	353
2019	353
2020 to 2024	$ 1,754

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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.

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The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

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The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate benefit obligation for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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