PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 7) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Actual pension asset returns
Extended period of time used to determine if fundamental changes in capital markets affect plan asset return assumptions, low end of range	10 years
Extended period of time used to determine if fundamental changes in capital markets affect plan asset return assumptions, high end of range	20 years
Average annual return of company's U.S. pension fund over past 10 years (as a percent)	9.30%
Average annual return of company's U.S. pension fund over past 20 years (as a percent)	9.70%
Defined contribution plans related to employee investment and savings primarily in the U.S.
Defined contribution plans employer contributions and costs (primarily in the U.S.)	$ 155	$ 108	$ 85
Level 3
Reconciliation of level 3 fair value measurements
Beginning of year balance	1,765	1,443
Realized gain	18	33
Change in unrealized gain (loss)	74	192
Purchases, sales and settlements - net	112	97
End of year balance	1,969	1,765
Level 3 | Real Estate
Reconciliation of level 3 fair value measurements
Beginning of year balance	437	378
Change in unrealized gain (loss)	(4)	48
Purchases, sales and settlements - net	3	11
End of year balance	436	437
Level 3 | Private Equity/Venture Capital
Reconciliation of level 3 fair value measurements
Beginning of year balance	1,178	912
Realized gain	18	32
Change in unrealized gain (loss)	65	141
Purchases, sales and settlements - net	112	93
End of year balance	1,373	1,178
Level 3 | Hedge Funds
Reconciliation of level 3 fair value measurements
Beginning of year balance	150	153
Realized gain		1
Change in unrealized gain (loss)	13	3
Purchases, sales and settlements - net	(3)	(7)
End of year balance	160	150
Pensions
Reconciliation of level 3 fair value measurements
End of year balance	10,017	9,552	9,504
Pensions | Real Estate
Reconciliation of level 3 fair value measurements
Beginning of year balance	505
End of year balance	537
Target asset allocations, pension and health care plan assets
Target allocation percentage	5.00%
Pensions | Private Equity/Venture Capital
Reconciliation of level 3 fair value measurements
End of year balance	1,319	1,123
Pensions | Hedge Funds
Reconciliation of level 3 fair value measurements
End of year balance	578	608
Pensions | Debt Securities
Target asset allocations, pension and health care plan assets
Target allocation percentage	31.00%
Pensions | Equity Securities
Target asset allocations, pension and health care plan assets
Target allocation percentage	42.00%
Pensions | Other Investments
Reconciliation of level 3 fair value measurements
Beginning of year balance	448
End of year balance	508
Target asset allocations, pension and health care plan assets
Target allocation percentage	22.00%
Pensions | Level 3
Reconciliation of level 3 fair value measurements
End of year balance	1,892	1,682
Pensions | Level 3 | Real Estate
Reconciliation of level 3 fair value measurements
End of year balance	419	416
Pensions | Level 3 | Private Equity/Venture Capital
Reconciliation of level 3 fair value measurements
End of year balance	1,319	1,123
Pensions | Level 3 | Hedge Funds
Reconciliation of level 3 fair value measurements
End of year balance	154	143
Health Care and Life Insurance
Reconciliation of level 3 fair value measurements
End of year balance	1,287	1,459	1,637
Health Care and Life Insurance | Real Estate
Reconciliation of level 3 fair value measurements
Beginning of year balance	57
End of year balance	53
Target asset allocations, pension and health care plan assets
Target allocation percentage	3.00%
Health Care and Life Insurance | Private Equity/Venture Capital
Reconciliation of level 3 fair value measurements
End of year balance	54	55
Health Care and Life Insurance | Hedge Funds
Reconciliation of level 3 fair value measurements
End of year balance	85	110
Health Care and Life Insurance | Debt Securities
Target asset allocations, pension and health care plan assets
Target allocation percentage	31.00%
Health Care and Life Insurance | Equity Securities
Target asset allocations, pension and health care plan assets
Target allocation percentage	51.00%
Health Care and Life Insurance | Other Investments
Reconciliation of level 3 fair value measurements
Beginning of year balance	22
End of year balance	21
Target asset allocations, pension and health care plan assets
Target allocation percentage	15.00%
Health Care and Life Insurance | Level 3
Reconciliation of level 3 fair value measurements
Beginning of year balance	83
End of year balance	77	83
Percentage of Level 3 assets related to health care assets	4.00%	5.00%	5.00%
Health Care and Life Insurance | Level 3 | Real Estate
Reconciliation of level 3 fair value measurements
End of year balance	17	21
Health Care and Life Insurance | Level 3 | Private Equity/Venture Capital
Reconciliation of level 3 fair value measurements
End of year balance	54	55
Health Care and Life Insurance | Level 3 | Hedge Funds
Reconciliation of level 3 fair value measurements
End of year balance	$ 6	$ 7