|**Short Term Debt Instruments (Tables)**     | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|-------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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|**Line of Credit Facility [Abstract]**       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Schedule of Line of Credit Facilities        | We did not have any borrowings under the revolving syndicated credit facility for thethreemonths endedJanuary 31, 2015. A summary of the short-term debt activity under our CP program for thethreemonths endedJanuary 31, 2015is as follows.In millionsThree MonthsMinimum amount outstanding during period$355Maximum amount outstanding during period$580Minimum interest rate during period.15%Maximum interest rate during period.30%Weighted average interest rate during period.21%
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|In millions                                  | Three Months                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|Minimum amount outstanding during period     | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Maximum amount outstanding during period     | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Minimum interest rate during period          | .15                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Maximum interest rate during period          | .30                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Weighted average interest rate during period | .21                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

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                    duration X- DefinitionTabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line.+ ReferencesReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5+ Details**Name:**
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