| **Restructuring and Impairments (Tables)**                           | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **Restructuring and Related Activities [Abstract]**                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Restructuring and Related Costs [Table Text Block]                   | The following table reconciles our impairment charges in our Consolidated Statements of Operations Three Months Ended April 30, Six Months Ended April 30,(in millions)2015 2014 2015 2014Goodwill impairment charge$— $142 $— $142Intangible asset impairment charge— 7 — 7Other asset impairment charges related to continuing operations1 2 8 20Total asset impairment charges$1 $151 $8 $169                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Schedule of Restructuring Reserve by Type of Cost [Table Text Block] | The following tables summarize the activity in the restructuring liability, which includes amounts related to discontinued operations and excludes pension and other postretirement contractual termination benefits:(in millions)Balance at October 31, 2014 Additions Payments Adjustments Balance at April 30, 2015Employee termination charges$8 $7 $(4) $(1) $10Lease vacancy11 — (4) — 7Other1 — — — 1Restructuring liability$20 $7 $(8) $(1) $18(in millions)Balance atOctober 31, 2013 Additions Payments Adjustments Balance at April 30, 2014Employee termination charges$15 $9 $(8) $— $16Employee relocation costs— 1 (1) — —Lease vacancy18 1 (4) — 15Other1 — (2) — (1)Restructuring liability$34 $11 $(15) $— $30 |

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| - Definition
Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets.
+ References
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| - Definition
Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period.
+ References
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