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| **Compensation and Retirement Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Schedule of Net Benefit Costs [Table Text Block]      |  Three Months Ended April 30, Six Months Ended April 30, Pension Benefits Health and LifeInsurance Benefits Pension Benefits Health and LifeInsurance Benefits(in millions)2016 2015 2016 2015 2016 2015 2016 2015Service cost for benefits earned during the period$3 $3 $2 $2 $5 $6 $3 $3Interest on obligation29 35 15 18 59 71 30 36Amortization of cumulative loss26 24 8 9 52 49 16 19Amortization of prior service benefit— — (1) (1) — — (1) (2)Contractual termination benefits2 (1) — (1) 2 (1) — (1)Premiums on pension insurance4 4 — — 8 5 — —Expected return on assets(42) (48) (7) (8) (84) (97) (13) (15)Net periodic benefit expense$22 $17 $17 $19 $42 $33 $35 $40 |

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| - References
No definition available.
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| - Definition
Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920
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