Retirement and Post-Retirement Benefit Plans (Details 5) - USD ($) $ in Millions	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Non-U.S. Defined Benefit Plans
Defined benefit plans
Fair value of plan assets	$ 16,662	$ 16,624	$ 5,098
Non-U.S. Defined Benefit Plans | U.S.
Defined benefit plans
Fair value of plan assets	740	837
Non-U.S. Defined Benefit Plans | Non-U.S.
Defined benefit plans
Fair value of plan assets	1,333	2,386
Non-U.S. Defined Benefit Plans | Corporate
Defined benefit plans
Fair value of plan assets	2,558	2,646
Non-U.S. Defined Benefit Plans | Government debt securities
Defined benefit plans
Fair value of plan assets	805	843
Non-U.S. Defined Benefit Plans | Private Equity
Defined benefit plans
Fair value of plan assets	72	69
Non-U.S. Defined Benefit Plans | Hybrids
Defined benefit plans
Fair value of plan assets	458	2,576
Non-U.S. Defined Benefit Plans | Hybrids At NAV [Member]
Defined benefit plans
Fair value of plan assets	2,851	343
Non-U.S. Defined Benefit Plans | Hedge Funds
Defined benefit plans
Fair value of plan assets	235	320
Non-U.S. Defined Benefit Plans | Equities at NAV
Defined benefit plans
Fair value of plan assets	3,125	2,821
Non-U.S. Defined Benefit Plans | Fixed Income at NAV
Defined benefit plans
Fair value of plan assets	948	993
Non-U.S. Defined Benefit Plans | Emerging Markets at NAV
Defined benefit plans
Fair value of plan assets	955	844
Non-U.S. Defined Benefit Plans | Alternative investments at NAV
Defined benefit plans
Fair value of plan assets	367	297
Non-U.S. Defined Benefit Plans | Real Estate Funds
Defined benefit plans
Fair value of plan assets	791	1,051
Non-U.S. Defined Benefit Plans | Insurance Group Annuity Contracts
Defined benefit plans
Fair value of plan assets	101	117
Non-U.S. Defined Benefit Plans | Cash and cash equivalents
Defined benefit plans
Fair value of plan assets	1,061	372
Non-U.S. Defined Benefit Plans | Other
Defined benefit plans
Fair value of plan assets	262	109
Non-U.S. Defined Benefit Plans | Level 1
Defined benefit plans
Fair value of plan assets	3,075	3,573
Non-U.S. Defined Benefit Plans | Level 1 | U.S.
Defined benefit plans
Fair value of plan assets	706	772
Non-U.S. Defined Benefit Plans | Level 1 | Non-U.S.
Defined benefit plans
Fair value of plan assets	1,022	1,910
Non-U.S. Defined Benefit Plans | Level 1 | Corporate
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 1 | Government debt securities
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 1 | Private Equity
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 1 | Hybrids
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 1 | Hybrids At NAV [Member]
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 1 | Hedge Funds
Defined benefit plans
Fair value of plan assets	0	11
Non-U.S. Defined Benefit Plans | Level 1 | Equities at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 1 | Fixed Income at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 1 | Emerging Markets at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 1 | Alternative investments at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 1 | Real Estate Funds
Defined benefit plans
Fair value of plan assets	215	447
Non-U.S. Defined Benefit Plans | Level 1 | Insurance Group Annuity Contracts
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 1 | Cash and cash equivalents
Defined benefit plans
Fair value of plan assets	1,061	372
Non-U.S. Defined Benefit Plans | Level 1 | Other
Defined benefit plans
Fair value of plan assets	71	61
Non-U.S. Defined Benefit Plans | Level 1 | Nominal And/or Inflation Linked Returns
Defined benefit plans
Fair value of plan assets	2,478	0
Non-U.S. Defined Benefit Plans | Level 1 | FTSE All World Developed Index
Defined benefit plans
Fair value of plan assets	373	343
Non-U.S. Defined Benefit Plans | Level 2
Defined benefit plans
Fair value of plan assets	4,610	6,706
Non-U.S. Defined Benefit Plans | Level 2 | U.S.
Defined benefit plans
Fair value of plan assets	34	65
Non-U.S. Defined Benefit Plans | Level 2 | Non-U.S.
Defined benefit plans
Fair value of plan assets	227	408
Non-U.S. Defined Benefit Plans | Level 2 | Corporate
Defined benefit plans
Fair value of plan assets	2,558	2,646
Non-U.S. Defined Benefit Plans | Level 2 | Government debt securities
Defined benefit plans
Fair value of plan assets	805	843
Non-U.S. Defined Benefit Plans | Level 2 | Private Equity
Defined benefit plans
Fair value of plan assets	4	1
Non-U.S. Defined Benefit Plans | Level 2 | Hybrids
Defined benefit plans
Fair value of plan assets	458	2,576
Non-U.S. Defined Benefit Plans | Level 2 | Hybrids At NAV [Member]
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 2 | Hedge Funds
Defined benefit plans
Fair value of plan assets	148	73
Non-U.S. Defined Benefit Plans | Level 2 | Equities at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 2 | Fixed Income at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 2 | Emerging Markets at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 2 | Alternative investments at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 2 | Real Estate Funds
Defined benefit plans
Fair value of plan assets	269	33
Non-U.S. Defined Benefit Plans | Level 2 | Insurance Group Annuity Contracts
Defined benefit plans
Fair value of plan assets	38	48
Non-U.S. Defined Benefit Plans | Level 2 | Cash and cash equivalents
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 2 | Other
Defined benefit plans
Fair value of plan assets	69	13
Non-U.S. Defined Benefit Plans | Level 3
Defined benefit plans
Fair value of plan assets	731	1,047	369
Non-U.S. Defined Benefit Plans | Level 3 | U.S.
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 3 | Non-U.S.
Defined benefit plans
Fair value of plan assets	84	68	0
Non-U.S. Defined Benefit Plans | Level 3 | Corporate
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 3 | Government debt securities
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 3 | Private Equity
Defined benefit plans
Fair value of plan assets	68	68	28
Non-U.S. Defined Benefit Plans | Level 3 | Hybrids
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 3 | Hybrids At NAV [Member]
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 3 | Hedge Funds
Defined benefit plans
Fair value of plan assets	87	236	0
Non-U.S. Defined Benefit Plans | Level 3 | Equities at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 3 | Fixed Income at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 3 | Emerging Markets at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 3 | Alternative investments at NAV
Defined benefit plans
Fair value of plan assets
Non-U.S. Defined Benefit Plans | Level 3 | Real Estate Funds
Defined benefit plans
Fair value of plan assets	307	571	336
Non-U.S. Defined Benefit Plans | Level 3 | Insurance Group Annuity Contracts
Defined benefit plans
Fair value of plan assets	63	69	5
Non-U.S. Defined Benefit Plans | Level 3 | Cash and cash equivalents
Defined benefit plans
Fair value of plan assets	0	0
Non-U.S. Defined Benefit Plans | Level 3 | Other
Defined benefit plans
Fair value of plan assets	122	35	0
Post-Retirement Benefit Plans
Defined benefit plans
Fair value of plan assets	47	40	$ 0
Post-Retirement Benefit Plans | Registered Investment Companies
Defined benefit plans
Fair value of plan assets	$ 47	$ 40