Retirement and Post-Retirement Benefit Plans (Details 6) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Post-Retirement Benefit Plans
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	$ 47	$ 40
Actual return on plan assets:
Fair value—end of year(3)	50	47
Future Contributions and Funding Policy
Employer contributions	4	3
Expected contribution to defined benefit plans in fiscal 2018	4
Future benefits payable for the retirement and post-retirement plans
2018	6
2019	7
2020	8
2021	9
2022	10
Next five fiscal years to October 31, 2027	60
Post-Retirement Benefit Plans | Discontinued Operations
Future Contributions and Funding Policy
Employer contributions	2
Non-U.S. Plans | Defined Benefit Plans
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	11,989	11,684
Actual return on plan assets:
Fair value—end of year(3)	$ 12,610	$ 11,989
2017 Target Allocation	100.00%
Plan Assets	100.00%	100.00%
Future Contributions and Funding Policy
Employer contributions	$ 266	$ 242
Expected contribution to defined benefit plans in fiscal 2018	180
Future benefits payable for the retirement and post-retirement plans
2018	439
2019	410
2020	435
2021	419
2022	471
Next five fiscal years to October 31, 2027	2,627
Non-U.S. Plans | Defined Benefit Plans | Discontinued Operations
Future Contributions and Funding Policy
Employer contributions	2,200
Non-U.S. Plans | Defined Benefit Plans | Private Equity
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	36
Actual return on plan assets:
Fair value—end of year(3)	$ 40	$ 36
Plan Assets	25.70%	13.50%
Non-U.S. Plans | Defined Benefit Plans | Hedge Funds
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	$ 192
Actual return on plan assets:
Fair value—end of year(3)	63	$ 192
Non-U.S. Plans | Defined Benefit Plans | Real Estate Funds
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	510
Actual return on plan assets:
Fair value—end of year(3)	$ 253	$ 510
Plan Assets	3.30%	6.50%
Non-U.S. Plans | Defined Benefit Plans | Insurance Group Annuities
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	$ 100
Actual return on plan assets:
Fair value—end of year(3)	87	$ 100
Non-U.S. Plans | Defined Benefit Plans | Other
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	262
Actual return on plan assets:
Fair value—end of year(3)	$ 166	$ 262
Non-U.S. Plans | Defined Benefit Plans | Public equity securities
Actual return on plan assets:
Plan Assets	33.80%	43.90%
Non-U.S. Plans | Defined Benefit Plans | Equity-related investments
Actual return on plan assets:
2017 Target Allocation	58.10%
Plan Assets	62.80%	63.90%
Non-U.S. Plans | Defined Benefit Plans | Debt securities
Actual return on plan assets:
2017 Target Allocation	39.90%
Plan Assets	32.90%	33.00%
Non-U.S. Plans | Defined Benefit Plans | Cash and cash equivalents
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	$ 375
Actual return on plan assets:
Fair value—end of year(3)	$ 547	$ 375
2017 Target Allocation	2.00%
Plan Assets	4.30%	3.10%
Non-U.S. Plans | Level 3 | Defined Benefit Plans
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	$ 129	$ 596
Actual return on plan assets:
Relating to assets held at the reporting date	(24)	(72)
Relating to assets sold during the period	1	1
Purchases, sales, and settlements	28	70
Transfers in and/or out of Level 3	9	(466)
Fair value—end of year(3)	143	129
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Private Equity
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	32	27
Actual return on plan assets:
Relating to assets held at the reporting date	0	(1)
Relating to assets sold during the period	1	4
Purchases, sales, and settlements	0	2
Transfers in and/or out of Level 3	0	0
Fair value—end of year(3)	33	32
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Hedge Funds
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	0	236
Actual return on plan assets:
Relating to assets held at the reporting date		(35)
Relating to assets sold during the period		0
Purchases, sales, and settlements		(11)
Transfers in and/or out of Level 3		(190)
Fair value—end of year(3)	0	0
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Real Estate Funds
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	26	229
Actual return on plan assets:
Relating to assets held at the reporting date	3	(33)
Relating to assets sold during the period	0	0
Purchases, sales, and settlements	0	0
Transfers in and/or out of Level 3	28	(170)
Fair value—end of year(3)	57	26
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Insurance Group Annuities
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	63	69
Actual return on plan assets:
Relating to assets held at the reporting date	(39)	(2)
Relating to assets sold during the period	0	(3)
Purchases, sales, and settlements	0	(3)
Transfers in and/or out of Level 3	28	2
Fair value—end of year(3)	52	63
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Other
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	8	35
Actual return on plan assets:
Relating to assets held at the reporting date	12	(1)
Relating to assets sold during the period	0	0
Purchases, sales, and settlements	28	82
Transfers in and/or out of Level 3	(47)	(108)
Fair value—end of year(3)	1	8
Non-U.S. Plans | Level 3 | Defined Benefit Plans | Cash and cash equivalents
Changes in fair value measurements of Level 3 investments
Fair value—beginning of year	0
Actual return on plan assets:
Fair value—end of year(3)	0	$ 0
U.S. non-qualified plan participants | U.S. Plans
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2018	1
Discontinued Operations, Disposed of by Means Other than Sale [Member] | Everett Transaction | Non-U.S. Plans | Defined Benefit Plans
Future Contributions and Funding Policy
Employer contributions	$ 1,900