Retirement and Post-Retirement Benefit Plans (Details 5) (USD $) In Millions, unless otherwise specified	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Net pension and post-retirement benefit costs
Fair value of plan assets	$ 11,607	$ 10,354
U.S. Defined Benefit Plans
Net pension and post-retirement benefit costs
Fair value of plan assets	10,662	9,427	8,371
U.S. Defined Benefit Plans | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	974	1,464
U.S. Defined Benefit Plans | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	850	1,193
U.S. Defined Benefit Plans | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	3,031	2,931
U.S. Defined Benefit Plans | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	3,132	2,306
U.S. Defined Benefit Plans | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,359	1,036
U.S. Defined Benefit Plans | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	4	6
U.S. Defined Benefit Plans | Common Collective Trusts and 103-12 Investment Entities
Net pension and post-retirement benefit costs
Fair value of plan assets	843
U.S. Defined Benefit Plans | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	581
U.S. Defined Benefit Plans | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	64	491
U.S. Defined Benefit Plans | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(176)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1
Net pension and post-retirement benefit costs
Fair value of plan assets	3,713	3,976
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	974	1,460
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	850	1,193
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	1,801	1,314
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	3	2
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	206
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	(4)	7
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(117)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2
Net pension and post-retirement benefit costs
Fair value of plan assets	5,589	4,411
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets		4
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	3,031	2,931
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	1,331	992
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Common Collective Trusts and 103-12 Investment Entities
Net pension and post-retirement benefit costs
Fair value of plan assets	843
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	375
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	68	484
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(59)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Net pension and post-retirement benefit costs
Fair value of plan assets	1,360	1,040
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,356	1,034
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	4	6
Non-U.S. Defined Benefit Plans
Net pension and post-retirement benefit costs
Fair value of plan assets	13,180	12,760	11,325
Non-U.S. Defined Benefit Plans | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,370	1,287
Non-U.S. Defined Benefit Plans | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	4,420	5,917
Non-U.S. Defined Benefit Plans | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	2,951	2,924
Non-U.S. Defined Benefit Plans | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	1,275	1,002
Non-U.S. Defined Benefit Plans | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	21	14
Non-U.S. Defined Benefit Plans | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	790	21
Non-U.S. Defined Benefit Plans | Hedge Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	559	340
Non-U.S. Defined Benefit Plans | Real Estate Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	686	759
Non-U.S. Defined Benefit Plans | Insurance Group Annuity Contracts
Net pension and post-retirement benefit costs
Fair value of plan assets	151	145
Non-U.S. Defined Benefit Plans | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	577	332
Non-U.S. Defined Benefit Plans | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	380	19
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1
Net pension and post-retirement benefit costs
Fair value of plan assets	9,532	9,747
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,140	1,028
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	4,066	5,265
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	2,254	2,031
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	810	626
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets		3
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Hedge Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	107	102
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Real Estate Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	349	363
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Insurance Group Annuity Contracts
Net pension and post-retirement benefit costs
Fair value of plan assets	16	17
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	573	305
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	217	7
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2
Net pension and post-retirement benefit costs
Fair value of plan assets	2,992	2,397
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	200	195
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	354	652
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	694	887
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	465	376
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	1
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	790	18
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Hedge Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	152	7
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Real Estate Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	138	171
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Insurance Group Annuity Contracts
Net pension and post-retirement benefit costs
Fair value of plan assets	46	54
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	8	27
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	144	10
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Net pension and post-retirement benefit costs
Fair value of plan assets	656	616
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	30	64
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	3	6
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	20	14
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hedge Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	300	231
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Real Estate Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	199	225
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Insurance Group Annuity Contracts
Net pension and post-retirement benefit costs
Fair value of plan assets	89	74
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	(4)
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	19	2
Post-Retirement Benefit Plans
Net pension and post-retirement benefit costs
Fair value of plan assets	394	374	352
Post-Retirement Benefit Plans | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	16	68
Post-Retirement Benefit Plans | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	7	40
Post-Retirement Benefit Plans | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	22	57
Post-Retirement Benefit Plans | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	27	44
Post-Retirement Benefit Plans | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	227	154
Post-Retirement Benefit Plans | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	1	1
Post-Retirement Benefit Plans | Common Collective Trusts and 103-12 Investment Entities
Net pension and post-retirement benefit costs
Fair value of plan assets	21
Post-Retirement Benefit Plans | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	76
Post-Retirement Benefit Plans | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	2	10
Post-Retirement Benefit Plans | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(5)
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1
Net pension and post-retirement benefit costs
Fair value of plan assets	92	127
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	16	68
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	7	40
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	5	14
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	69
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets		5
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(5)
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2
Net pension and post-retirement benefit costs
Fair value of plan assets	74	92
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	22	57
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	22	30
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Common Collective Trusts and 103-12 Investment Entities
Net pension and post-retirement benefit costs
Fair value of plan assets	21
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	7
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	2	5
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3
Net pension and post-retirement benefit costs
Fair value of plan assets	228	155
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3 | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	227	154
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3 | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	$ 1	$ 1