| **Inventories**               | 6 Months Ended                                                                                                                                                                                                                                                            |
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| **Inventory, Net [Abstract]** | Â                                                                                                                                                                                                                                                                         |
| Inventories                   | Inventories  As of  April 30, 2011 October 31, 2010(in millions)    Finished products $932 $893Work in process 208 202Raw materials 581 473Total inventories $1,721 $1,568 |

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| - Definition
This element represents the complete disclosure related to inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 9Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a, b, c -Article 5
+ Details**Name:**us-gaap_InventoryDisclosureTextBlock**Namespace Prefix:**us-gaap**Data Type:**us-types:textBlockItemType**Balance Type:**na**Period Type:**duration |
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| - Details**Name:**us-gaap_InventoryNetAbstract**Namespace Prefix:**us-gaap**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |