Retirement and Post-Retirement Benefit Plans (Details 5) (USD $)	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Non-US debt securities and hedge funds
Net pension and post-retirement benefit costs
Reclassified from level 1 to level 2	$ 3,200,000,000
U.S. Defined Benefit Plans
Net pension and post-retirement benefit costs
Fair value of plan assets	11,536,000,000	10,662,000,000	9,427,000,000
U.S. Defined Benefit Plans | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,150,000,000	974,000,000
U.S. Defined Benefit Plans | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	866,000,000	850,000,000
U.S. Defined Benefit Plans | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	3,443,000,000	3,031,000,000
U.S. Defined Benefit Plans | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	3,037,000,000	3,132,000,000
U.S. Defined Benefit Plans | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,303,000,000	1,359,000,000
U.S. Defined Benefit Plans | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	2,000,000	4,000,000
U.S. Defined Benefit Plans | Hedge Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	65,000,000
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	1,546,000,000	843,000,000
U.S. Defined Benefit Plans | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	461,000,000	581,000,000
U.S. Defined Benefit Plans | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	42,000,000	64,000,000
U.S. Defined Benefit Plans | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(379,000,000)	(176,000,000)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1
Net pension and post-retirement benefit costs
Fair value of plan assets	3,453,000,000	3,713,000,000
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	1,150,000,000	974,000,000
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	866,000,000	850,000,000
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	1,626,000,000	1,801,000,000
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	3,000,000	3,000,000
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	119,000,000	206,000,000
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	(66,000,000)	(4,000,000)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(245,000,000)	(117,000,000)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2
Net pension and post-retirement benefit costs
Fair value of plan assets	6,715,000,000	5,589,000,000
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	3,442,000,000	3,031,000,000
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	1,411,000,000	1,331,000,000
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	1,546,000,000	843,000,000
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	342,000,000	375,000,000
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	108,000,000	68,000,000
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(134,000,000)	(59,000,000)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Net pension and post-retirement benefit costs
Fair value of plan assets	1,368,000,000	1,360,000,000	1,040,000,000
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	1,000,000
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	1,300,000,000	1,356,000,000	1,034,000,000
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	2,000,000	4,000,000	6,000,000
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	65,000,000
Non-U.S. Defined Benefit Plans
Net pension and post-retirement benefit costs
Fair value of plan assets	14,021,000,000	13,180,000,000	12,760,000,000
Non-U.S. Defined Benefit Plans | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	1,649,000,000	1,370,000,000
Non-U.S. Defined Benefit Plans | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	4,175,000,000	4,420,000,000
Non-U.S. Defined Benefit Plans | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	2,878,000,000	2,951,000,000
Non-U.S. Defined Benefit Plans | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	1,653,000,000	1,275,000,000
Non-U.S. Defined Benefit Plans | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	23,000,000	21,000,000
Non-U.S. Defined Benefit Plans | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	1,089,000,000	790,000,000
Non-U.S. Defined Benefit Plans | Hedge Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	529,000,000	559,000,000
Non-U.S. Defined Benefit Plans | Real Estate Funds
Net pension and post-retirement benefit costs
Fair value of plan assets	820,000,000	686,000,000
Non-U.S. Defined Benefit Plans | Insurance Group Annuity Contracts
Net pension and post-retirement benefit costs
Fair value of plan assets	148,000,000	151,000,000
Non-U.S. Defined Benefit Plans | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	444,000,000	577,000,000
Non-U.S. Defined Benefit Plans | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	613,000,000	380,000,000
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1
Net pension and post-retirement benefit costs
Fair value of plan assets	7,135,000,000	6,361,000,000
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	1,621,000,000	1,140,000,000
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	4,049,000,000	4,066,000,000
Non-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	2,000,000
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	449,000,000	349,000,000
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		16,000,000
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	439,000,000	573,000,000
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	575,000,000	217,000,000
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2
Net pension and post-retirement benefit costs
Fair value of plan assets	6,272,000,000	6,163,000,000
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	28,000,000	200,000,000
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	50,000,000	354,000,000
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	2,878,000,000	2,948,000,000
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	1,653,000,000	1,275,000,000
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		1,000,000
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	1,089,000,000	790,000,000
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	296,000,000	259,000,000
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	177,000,000	138,000,000
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	60,000,000	46,000,000
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	5,000,000	8,000,000
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	36,000,000	144,000,000
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Net pension and post-retirement benefit costs
Fair value of plan assets	614,000,000	656,000,000	616,000,000
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		30,000,000	64,000,000
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets	76,000,000
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		3,000,000	6,000,000
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	21,000,000	20,000,000	14,000,000
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	233,000,000	300,000,000	231,000,000
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	194,000,000	199,000,000	225,000,000
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	88,000,000	89,000,000	74,000,000
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		(4,000,000)
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	2,000,000	19,000,000	2,000,000
Post-Retirement Benefit Plans
Net pension and post-retirement benefit costs
Fair value of plan assets	395,000,000	394,000,000	374,000,000
Post-Retirement Benefit Plans | U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets		16,000,000
Post-Retirement Benefit Plans | Non-U.S, equity securities
Net pension and post-retirement benefit costs
Fair value of plan assets		7,000,000
Post-Retirement Benefit Plans | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	17,000,000	22,000,000
Post-Retirement Benefit Plans | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	22,000,000	27,000,000
Post-Retirement Benefit Plans | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	235,000,000	227,000,000
Post-Retirement Benefit Plans | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	1,000,000	1,000,000
Post-Retirement Benefit Plans | Common Collective Trusts and 103-12 Investment Entities
Net pension and post-retirement benefit costs
Fair value of plan assets	49,000,000	21,000,000
Post-Retirement Benefit Plans | Registered Investment Companies
Net pension and post-retirement benefit costs
Fair value of plan assets	73,000,000	76,000,000
Post-Retirement Benefit Plans | Cash and Cash Equivalents
Net pension and post-retirement benefit costs
Fair value of plan assets	2,000,000	2,000,000
Post-Retirement Benefit Plans | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(4,000,000)	(5,000,000)
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1
Net pension and post-retirement benefit costs
Fair value of plan assets	75,000,000	92,000,000
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		16,000,000
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		7,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	6,000,000	5,000,000
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	73,000,000	69,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Other
Net pension and post-retirement benefit costs
Fair value of plan assets	(4,000,000)	(5,000,000)
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2
Net pension and post-retirement benefit costs
Fair value of plan assets	84,000,000	74,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Corporate
Net pension and post-retirement benefit costs
Fair value of plan assets	17,000,000	22,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Government
Net pension and post-retirement benefit costs
Fair value of plan assets	16,000,000	22,000,000
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	49,000,000	21,000,000
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		7,000,000
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	2,000,000	2,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3
Net pension and post-retirement benefit costs
Fair value of plan assets	236,000,000	228,000,000	155,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3 | Private Equities
Net pension and post-retirement benefit costs
Fair value of plan assets	235,000,000	227,000,000	154,000,000
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3 | Hybrids
Net pension and post-retirement benefit costs
Fair value of plan assets	$ 1,000,000	$ 1,000,000	$ 1,000,000