PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 6) (USD $) In Millions, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	$ 2,677	$ 2,062	$ 1,969
Real Estate | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	446	443	436
Private Equity/Venture Capital | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,622	1,464	1,373
Hedge Funds | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	609	155	160
Pensions
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	11,447	11,008	10,017
Pensions | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	5,771	5,834
Pensions | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	3,071	3,180
Pensions | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	2,605	1,994
Pensions | Cash and Short-term Investments
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,085	1,190
Pensions | Cash and Short-term Investments | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	426	317
Pensions | Cash and Short-term Investments | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	659	873
Pensions | U.S. Equity Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	3,084	3,321
Pensions | U.S. Equity Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	3,084	3,321
Pensions | U.S. Equity Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	42	47
Pensions | U.S. Equity Funds | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	4	5
Pensions | U.S. Equity Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	38	42
Pensions | International Equity Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,972	1,953
Pensions | International Equity Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,972	1,953
Pensions | International Equity Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	456	481
Pensions | International Equity Funds | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	74	68
Pensions | International Equity Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	382	413
Pensions | Government and Agency Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	436	391
Pensions | Government and Agency Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	412	370
Pensions | Government and Agency Securities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	24	21
Pensions | Corporate Debt Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	324	278
Pensions | Corporate Debt Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1
Pensions | Corporate Debt Securities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	323	278
Pensions | Mortgage-backed Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	96	106
Pensions | Mortgage-backed Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	11	14
Pensions | Mortgage-backed Securities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	85	92
Pensions | Fixed Income Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,080	601
Pensions | Fixed Income Funds | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	127	91
Pensions | Fixed Income Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	953	510
Pensions | Real Estate
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	574	550
Pensions | Real Estate | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	132	110
Pensions | Real Estate | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	8	12
Pensions | Real Estate | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	434	428
Pensions | Private Equity/Venture Capital
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,578	1,416
Pensions | Private Equity/Venture Capital | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1,578	1,416
Pensions | Hedge Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	593	529
Pensions | Hedge Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets		379
Pensions | Hedge Funds | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	593	150
Pensions | Other Investments
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	324	389
Pensions | Other Investments | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	3	3
Pensions | Other Investments | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	321	386
Pensions | Derivative Contracts - Assets
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	322	769
Pensions | Derivative Contracts - Assets | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	14	10
Pensions | Derivative Contracts - Assets | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	308	759
Pensions | Derivative Contracts - Assets | Interest Rate Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	246	749
Pensions | Derivative Contracts - Assets | Foreign Exchange Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	61	10
Pensions | Derivative Contracts - Assets | Equity Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	11	9
Pensions | Derivative Contracts - Assets | Other Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	4	1
Pensions | Derivative Contracts - Liabilities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(39)	(591)
Pensions | Derivative Contracts - Liabilities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(9)	(6)
Pensions | Derivative Contracts - Liabilities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(30)	(585)
Pensions | Derivative Contracts - Liabilities | Interest Rate Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(6)	(563)
Pensions | Derivative Contracts - Liabilities | Foreign Exchange Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(25)	(22)
Pensions | Derivative Contracts - Liabilities | Other Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(8)	(6)
Pensions | Receivables, Payables and Other
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(3)	14
Pensions | Receivables, Payables and Other | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(3)	14
Pensions | Securities Lending Collateral
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	847	716
Pensions | Securities Lending Collateral | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	847	716
Pensions | Securities Lending Liability
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(847)	(716)
Pensions | Securities Lending Liability | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(847)	(716)
Pensions | Securities Sold Short
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(477)	(436)
Pensions | Securities Sold Short | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(477)	(436)
Health Care and Life Insurance
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	957	1,157	1,287
Health Care and Life Insurance | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	557	654
Health Care and Life Insurance | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	328	435
Health Care and Life Insurance | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	72	68
Health Care and Life Insurance | Cash and Short-term Investments
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	55	58
Health Care and Life Insurance | Cash and Short-term Investments | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	37	29
Health Care and Life Insurance | Cash and Short-term Investments | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	18	29
Health Care and Life Insurance | U.S. Equity Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	223	298
Health Care and Life Insurance | U.S. Equity Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	223	298
Health Care and Life Insurance | U.S. Equity Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	87	84
Health Care and Life Insurance | U.S. Equity Funds | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	87	84
Health Care and Life Insurance | International Equity Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	57	71
Health Care and Life Insurance | International Equity Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	57	71
Health Care and Life Insurance | International Equity Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	121	187
Health Care and Life Insurance | International Equity Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	121	187
Health Care and Life Insurance | Government and Agency Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	164	184
Health Care and Life Insurance | Government and Agency Securities | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	159	180
Health Care and Life Insurance | Government and Agency Securities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	5	4
Health Care and Life Insurance | Corporate Debt Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	33	33
Health Care and Life Insurance | Corporate Debt Securities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	33	33
Health Care and Life Insurance | Mortgage-backed Securities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	13	11
Health Care and Life Insurance | Mortgage-backed Securities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	13	11
Health Care and Life Insurance | Fixed Income Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	70	58
Health Care and Life Insurance | Fixed Income Funds | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1
Health Care and Life Insurance | Fixed Income Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	69	58
Health Care and Life Insurance | Real Estate
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	17	52
Health Care and Life Insurance | Real Estate | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	5	6
Health Care and Life Insurance | Real Estate | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets		31
Health Care and Life Insurance | Real Estate | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	12	15
Health Care and Life Insurance | Private Equity/Venture Capital
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	44	48
Health Care and Life Insurance | Private Equity/Venture Capital | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	44	48
Health Care and Life Insurance | Hedge Funds
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	72	71
Health Care and Life Insurance | Hedge Funds | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	56	66
Health Care and Life Insurance | Hedge Funds | Level 3
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	16	5
Health Care and Life Insurance | Other Investments
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	9	13
Health Care and Life Insurance | Other Investments | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	9	13
Health Care and Life Insurance | Derivative Contracts - Assets
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	5	4
Health Care and Life Insurance | Derivative Contracts - Assets | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	5	4
Health Care and Life Insurance | Derivative Contracts - Assets | Interest Rate Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	3	3
Health Care and Life Insurance | Derivative Contracts - Assets | Foreign Exchange Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	2	1
Health Care and Life Insurance | Derivative Contracts - Liabilities
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(1)	(1)
Health Care and Life Insurance | Derivative Contracts - Liabilities | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(1)	(1)
Health Care and Life Insurance | Derivative Contracts - Liabilities | Foreign Exchange Contracts
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(1)	(1)
Health Care and Life Insurance | Receivables, Payables and Other
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1	1
Health Care and Life Insurance | Receivables, Payables and Other | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	1	1
Health Care and Life Insurance | Securities Lending Collateral
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	126	109
Health Care and Life Insurance | Securities Lending Collateral | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	126	109
Health Care and Life Insurance | Securities Lending Liability
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(126)	(109)
Health Care and Life Insurance | Securities Lending Liability | Level 2
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(126)	(109)
Health Care and Life Insurance | Securities Sold Short
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	(13)	(15)
Health Care and Life Insurance | Securities Sold Short | Level 1
Fair Values of Pension Plan and Health Care Assets by Category
Total net assets	$ (13)	$ (15)