| **Inventories (Tables)**            | 9 Months Ended                                                                                                                                                                                                                                                |
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| **Inventory Disclosure [Abstract]** | Â                                                                                                                                                                                                                                                             |
| Schedule of inventories             |   As of  July 31, 2011 October 31, 2010(in millions)    Finished products $896 $893Work in process 187 202Raw materials 648 473Total inventories $1,731 $1,568 |

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| - Definition
Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic  -SubTopic  -Publisher SEC -Number 210 -Article 5 -Subparagraph a,b,c -Name Regulation S-X (SX) -Paragraph 6 -Section 2
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