Retirement and Post-Retirement Benefit Plans (Details 6) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	$ 10,354
Actual return on plan assets:
Fair value - end of year	11,607
Plan Asset Actual Allocations
Expected return on the plan assets used in calculating the net benefit costs (as a percent)	7.60%
Pension Plans
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2012	597
U.S. Defined Benefit Plans
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	9,427	8,371
Actual return on plan assets:
Fair value - end of year	10,662	9,427	8,371
Plan Asset Target Allocations
Equity-related investments (as a percent)	40.00%
Public debt securities (as a percent)	60.00%
Total (as a percent)	100.00%
Plan Asset Actual Allocations
Public equity securities (as a percent)	23.00%	28.20%
Private equity securities (as a percent)	12.80%	11.10%
Real estate and other (as a percent)	(1.70%)
Equity-related investments (as a percent)	34.10%	39.30%
Public debt securities (as a percent)	63.30%	55.50%
Cash (as a percent)	2.60%	5.20%
Total (as a percent)	100.00%	100.00%
Expected return on the plan assets used in calculating the net benefit costs (as a percent)	8.00%	8.00%	7.50%
Future benefits payable for the retirement and post-retirement plans
2012	490
2013	489
2014	505
2015	534
2016	576
Next five fiscal years to October 31, 2021	3,336
U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	1,040
Actual return on plan assets:
Relating to assets still held at the reporting date	127
Relating to assets sold during the period	155
Purchases, sales, settlements (net)	(30)
Transfers in and/or out of Level 3	68
Fair value - end of year	1,360
U.S. Defined Benefit Plans | U.S, equity securities
Actual return on plan assets:
Fair value - end of year	974	1,464
U.S. Defined Benefit Plans | Non-U.S, equity securities
Actual return on plan assets:
Fair value - end of year	850	1,193
U.S. Defined Benefit Plans | Corporate
Actual return on plan assets:
Fair value - end of year	3,031	2,931
U.S. Defined Benefit Plans | Government
Actual return on plan assets:
Fair value - end of year	3,132	2,306
U.S. Defined Benefit Plans | Private Equities
Actual return on plan assets:
Fair value - end of year	1,359	1,036
U.S. Defined Benefit Plans | Private Equities | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	1,034
Actual return on plan assets:
Relating to assets still held at the reporting date	127
Relating to assets sold during the period	154
Purchases, sales, settlements (net)	(29)
Transfers in and/or out of Level 3	70
Fair value - end of year	1,356
U.S. Defined Benefit Plans | Hybrids
Actual return on plan assets:
Fair value - end of year	4	6
U.S. Defined Benefit Plans | Hybrids | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	6
Actual return on plan assets:
Relating to assets sold during the period	1
Purchases, sales, settlements (net)	(1)
Transfers in and/or out of Level 3	(2)
Fair value - end of year	4
U.S. Defined Benefit Plans | Cash and Cash Equivalents
Actual return on plan assets:
Fair value - end of year	64	491
U.S. Defined Benefit Plans | Other
Actual return on plan assets:
Fair value - end of year	(176)
U.S. non-qualified plan participants
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2012	31
Non-U.S. Defined Benefit Plans
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	12,760	11,325
Actual return on plan assets:
Fair value - end of year	13,180	12,760	11,325
Plan Asset Target Allocations
Equity-related investments (as a percent)	67.00%
Public debt securities (as a percent)	31.10%
Cash (as a percent)	1.90%
Total (as a percent)	100.00%
Plan Asset Actual Allocations
Public equity securities (as a percent)	48.20%	57.60%
Private equity securities (as a percent)	6.20%	2.90%
Real estate and other (as a percent)	8.10%	6.10%
Equity-related investments (as a percent)	62.50%	66.60%
Public debt securities (as a percent)	33.20%	30.80%
Cash (as a percent)	4.30%	2.60%
Total (as a percent)	100.00%	100.00%
Expected return on the plan assets used in calculating the net benefit costs (as a percent)	6.80%	7.00%	6.90%
Future benefits payable for the retirement and post-retirement plans
2012	450
2013	443
2014	477
2015	506
2016	552
Next five fiscal years to October 31, 2021	3,562
Non-U.S. Defined Benefit Plans | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	616
Actual return on plan assets:
Relating to assets still held at the reporting date	(2)
Relating to assets sold during the period	(1)
Purchases, sales, settlements (net)	15
Transfers in and/or out of Level 3	28
Fair value - end of year	656
Non-U.S. Defined Benefit Plans | U.S, equity securities
Actual return on plan assets:
Fair value - end of year	1,370	1,287
Non-U.S. Defined Benefit Plans | U.S, equity securities | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	64
Actual return on plan assets:
Relating to assets still held at the reporting date	30
Transfers in and/or out of Level 3	(64)
Fair value - end of year	30
Non-U.S. Defined Benefit Plans | Non-U.S, equity securities
Actual return on plan assets:
Fair value - end of year	4,420	5,917
Non-U.S. Defined Benefit Plans | Corporate
Actual return on plan assets:
Fair value - end of year	2,951	2,924
Non-U.S. Defined Benefit Plans | Corporate | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	6
Actual return on plan assets:
Purchases, sales, settlements (net)	1
Transfers in and/or out of Level 3	(4)
Fair value - end of year	3
Non-U.S. Defined Benefit Plans | Government
Actual return on plan assets:
Fair value - end of year	1,275	1,002
Non-U.S. Defined Benefit Plans | Private Equities
Actual return on plan assets:
Fair value - end of year	21	14
Non-U.S. Defined Benefit Plans | Private Equities | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	14
Actual return on plan assets:
Relating to assets still held at the reporting date	3
Purchases, sales, settlements (net)	3
Fair value - end of year	20
Non-U.S. Defined Benefit Plans | Hybrids
Actual return on plan assets:
Fair value - end of year	790	21
Non-U.S. Defined Benefit Plans | Hedge Funds
Actual return on plan assets:
Fair value - end of year	559	340
Non-U.S. Defined Benefit Plans | Hedge Funds | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	231
Actual return on plan assets:
Relating to assets still held at the reporting date	(26)
Purchases, sales, settlements (net)	30
Transfers in and/or out of Level 3	65
Fair value - end of year	300
Non-U.S. Defined Benefit Plans | Real Estate Funds
Actual return on plan assets:
Fair value - end of year	686	759
Non-U.S. Defined Benefit Plans | Real Estate Funds | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	225
Actual return on plan assets:
Relating to assets still held at the reporting date	(26)
Fair value - end of year	199
Non-U.S. Defined Benefit Plans | Insurance Group Annuity Contracts
Actual return on plan assets:
Fair value - end of year	151	145
Non-U.S. Defined Benefit Plans | Insurance Group Annuity Contracts | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	74
Actual return on plan assets:
Relating to assets still held at the reporting date	17
Purchases, sales, settlements (net)	(18)
Transfers in and/or out of Level 3	16
Fair value - end of year	89
Non-U.S. Defined Benefit Plans | Cash and Cash Equivalents
Actual return on plan assets:
Fair value - end of year	577	332
Non-U.S. Defined Benefit Plans | Cash and Cash Equivalents | Fair Value Measured Using Level 3
Actual return on plan assets:
Transfers in and/or out of Level 3	(4)
Fair value - end of year	(4)
Non-U.S. Defined Benefit Plans | Other
Actual return on plan assets:
Fair value - end of year	380	19
Non-U.S. Defined Benefit Plans | Other | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	2
Actual return on plan assets:
Relating to assets sold during the period	(1)
Purchases, sales, settlements (net)	(1)
Transfers in and/or out of Level 3	19
Fair value - end of year	19
Post-Retirement Benefit Plans
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	374	352
Actual return on plan assets:
Fair value - end of year	394	374	352
Plan Asset Target Allocations
Equity-related investments (as a percent)	68.00%
Public debt securities (as a percent)	30.00%
Cash (as a percent)	2.00%
Total (as a percent)	100.00%
Plan Asset Actual Allocations
Public equity securities (as a percent)	12.20%	28.90%
Private equity securities (as a percent)	57.90%	41.40%
Real estate and other (as a percent)	(1.30%)
Equity-related investments (as a percent)	68.80%	70.30%
Public debt securities (as a percent)	27.60%	27.00%
Cash (as a percent)	3.60%	2.70%
Total (as a percent)	100.00%	100.00%
Expected return on the plan assets used in calculating the net benefit costs (as a percent)	10.50%	9.50%	9.30%
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2012	30
Future benefits payable for the retirement and post-retirement plans
2012	72
2013	67
2014	66
2015	64
2016	63
Next five fiscal years to October 31, 2021	286
Post-Retirement Benefit Plans | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	155
Actual return on plan assets:
Relating to assets still held at the reporting date	32
Relating to assets sold during the period	18
Purchases, sales, settlements (net)	23
Fair value - end of year	228
Post-Retirement Benefit Plans | U.S, equity securities
Actual return on plan assets:
Fair value - end of year	16	68
Post-Retirement Benefit Plans | Non-U.S, equity securities
Actual return on plan assets:
Fair value - end of year	7	40
Post-Retirement Benefit Plans | Corporate
Actual return on plan assets:
Fair value - end of year	22	57
Post-Retirement Benefit Plans | Government
Actual return on plan assets:
Fair value - end of year	27	44
Post-Retirement Benefit Plans | Private Equities
Actual return on plan assets:
Fair value - end of year	227	154
Post-Retirement Benefit Plans | Private Equities | Fair Value Measured Using Level 3
Changes in fair value measurements of Level 3 investments
Fair value - beginning of year	154
Actual return on plan assets:
Relating to assets still held at the reporting date	32
Relating to assets sold during the period	18
Purchases, sales, settlements (net)	23
Fair value - end of year	227
Post-Retirement Benefit Plans | Hybrids
Actual return on plan assets:
Fair value - end of year	1	1
Post-Retirement Benefit Plans | Hybrids | Fair Value Measured Using Level 3
Actual return on plan assets:
Fair value - end of year	1	1
Post-Retirement Benefit Plans | Cash and Cash Equivalents
Actual return on plan assets:
Fair value - end of year	2	10
Post-Retirement Benefit Plans | Other
Actual return on plan assets:
Fair value - end of year	$ (5)