Retirement and Post-Retirement Benefit Plans (Details 5) (USD $) In Millions, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
U.S. Defined Benefit Plans
Retirement and post-retirement benefit plans
Fair value of plan assets	$ 11,979	$ 10,866	$ 11,536
U.S. Defined Benefit Plans | U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	1,787	1,711
U.S. Defined Benefit Plans | Non-U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	1,268	1,274
U.S. Defined Benefit Plans | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	3,290	3,028
U.S. Defined Benefit Plans | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	2,204	1,849
U.S. Defined Benefit Plans | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	1,284	1,250
U.S. Defined Benefit Plans | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	3	2
U.S. Defined Benefit Plans | Hedge Funds, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	609	113
U.S. Defined Benefit Plans | Common Collective Trusts and 103-12 Investment Entities
Retirement and post-retirement benefit plans
Fair value of plan assets	854	1,233
U.S. Defined Benefit Plans | Registered Investment Companies
Retirement and post-retirement benefit plans
Fair value of plan assets	382	390
U.S. Defined Benefit Plans | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	227	73
U.S. Defined Benefit Plans | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	71	(57)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1
Retirement and post-retirement benefit plans
Fair value of plan assets	3,260	3,020
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	1,787	1,711
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Non-U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	1,268	1,274
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Registered Investment Companies
Retirement and post-retirement benefit plans
Fair value of plan assets	68	61
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	161	11
U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	(24)	(37)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2
Retirement and post-retirement benefit plans
Fair value of plan assets	7,162	6,481
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	3,283	3,028
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	2,204	1,849
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Hedge Funds, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	346
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Common Collective Trusts and 103-12 Investment Entities
Retirement and post-retirement benefit plans
Fair value of plan assets	854	1,233
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Registered Investment Companies
Retirement and post-retirement benefit plans
Fair value of plan assets	314	329
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	66	62
U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	95	(20)
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Retirement and post-retirement benefit plans
Fair value of plan assets	1,557	1,365	1,368
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	7		1
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	1,284	1,250	1,300
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	3	2	2
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hedge Funds, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	263	113	65
Non-U.S. Defined Benefit Plans
Retirement and post-retirement benefit plans
Fair value of plan assets	17,570	16,083	14,021
Non-U.S. Defined Benefit Plans | U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	2,965	2,487
Non-U.S. Defined Benefit Plans | Non-U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	4,872	4,806
Non-U.S. Defined Benefit Plans | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	2,935	3,347
Non-U.S. Defined Benefit Plans | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	1,787	1,751
Non-U.S. Defined Benefit Plans | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	53	50
Non-U.S. Defined Benefit Plans | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	2,623	1,223
Non-U.S. Defined Benefit Plans | Hedge Funds, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	388	430
Non-U.S. Defined Benefit Plans | Real Estate Funds
Retirement and post-retirement benefit plans
Fair value of plan assets	1,040	1,032
Non-U.S. Defined Benefit Plans | Insurance Group Annuity Contracts
Retirement and post-retirement benefit plans
Fair value of plan assets	123	131
Non-U.S. Defined Benefit Plans | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	573	652
Non-U.S. Defined Benefit Plans | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	211	174
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1
Retirement and post-retirement benefit plans
Fair value of plan assets	7,971	7,743
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	2,935	2,456
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Non-U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	4,050	4,059
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	114
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Real Estate Funds
Retirement and post-retirement benefit plans
Fair value of plan assets	220	470
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	573	648
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 1 | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	79	110
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2
Retirement and post-retirement benefit plans
Fair value of plan assets	8,516	7,603
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	30	31
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Non-U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	742	670
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	2,935	3,347
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	1,787	1,751
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	2	2
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	2,466	1,223
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Hedge Funds, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	103	226
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Real Estate Funds
Retirement and post-retirement benefit plans
Fair value of plan assets	277	237
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Insurance Group Annuity Contracts
Retirement and post-retirement benefit plans
Fair value of plan assets	44	50
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets		4
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 2 | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	130	62
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Retirement and post-retirement benefit plans
Fair value of plan assets	1,083	737	614
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Non-U.S, equity securities
Retirement and post-retirement benefit plans
Fair value of plan assets	80	77	76
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	51	48	21
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	43
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Hedge Funds, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	285	204	233
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Real Estate Funds
Retirement and post-retirement benefit plans
Fair value of plan assets	543	325	194
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Insurance Group Annuity Contracts
Retirement and post-retirement benefit plans
Fair value of plan assets	79	81	88
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3 | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	2	2	2
Post-Retirement Benefit Plans
Retirement and post-retirement benefit plans
Fair value of plan assets	458	396	395
Post-Retirement Benefit Plans | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	20	17
Post-Retirement Benefit Plans | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	22	22
Post-Retirement Benefit Plans | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	271	234
Post-Retirement Benefit Plans | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	1	1
Post-Retirement Benefit Plans | Common Collective Trusts and 103-12 Investment Entities
Retirement and post-retirement benefit plans
Fair value of plan assets	55	42
Post-Retirement Benefit Plans | Registered Investment Companies
Retirement and post-retirement benefit plans
Fair value of plan assets	87	79
Post-Retirement Benefit Plans | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	6	3
Post-Retirement Benefit Plans | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	(4)	(2)
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1
Retirement and post-retirement benefit plans
Fair value of plan assets	82	82
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets		5
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Registered Investment Companies
Retirement and post-retirement benefit plans
Fair value of plan assets	86	79
Post-Retirement Benefit Plans | Fair Value Measured Using Level 1 | Other
Retirement and post-retirement benefit plans
Fair value of plan assets	(4)	(2)
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2
Retirement and post-retirement benefit plans
Fair value of plan assets	104	79
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Corporate debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	20	17
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Government debt securities
Retirement and post-retirement benefit plans
Fair value of plan assets	22	17
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Common Collective Trusts and 103-12 Investment Entities
Retirement and post-retirement benefit plans
Fair value of plan assets	55	42
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Registered Investment Companies
Retirement and post-retirement benefit plans
Fair value of plan assets	1
Post-Retirement Benefit Plans | Fair Value Measured Using Level 2 | Cash and Cash Equivalents
Retirement and post-retirement benefit plans
Fair value of plan assets	6	3
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3
Retirement and post-retirement benefit plans
Fair value of plan assets	272	235	236
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3 | Private Equity, alternative Investments
Retirement and post-retirement benefit plans
Fair value of plan assets	271	234	235
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3 | Hybrids, alternative investments
Retirement and post-retirement benefit plans
Fair value of plan assets	$ 1	$ 1	$ 1