| **Summary Of Significant Accounting Policies (Details) - USD ($) $ in Thousands** | Jul. 31, 2016 | Oct. 31, 2015 |
|-----------------------------------------------------------------------------------|---------------|---------------|
| **New Accounting Pronouncements or Change in Accounting Principle [Line Items]**  |          |          |
| Current deferred income taxes                                                     |          | $ 32,400      |
| Noncurrent deferred income taxes                                                  | $ 932,338     | 829,223       |
| Total current assets                                                              | 269,956       | 223,545       |
| Total noncurrent liabilities                                                      | 1,750,086     | 1,492,773     |
| Total capitalization and liabilities                                              | $ 5,574,708   | 5,078,358     |
| Accounting Standards Update 2015-17                                               |          |          |
| **New Accounting Pronouncements or Change in Accounting Principle [Line Items]**  |          |          |
| Noncurrent deferred income taxes                                                  |          | 829,200       |
| Total current assets                                                              |          | 223,500       |
| Total noncurrent liabilities                                                      |          | 1,492,800     |
| Total capitalization and liabilities                                              |          | 5,078,400     |
| Deferred Tax Asset [Domain] | Accounting Standards Update 2015-17                 |          |          |
| **New Accounting Pronouncements or Change in Accounting Principle [Line Items]**  |          |          |
| Increase (Decrease) In Total Assets And Liabilities                               |          | $ (32,400)    |

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The increase (decrease) in total assets during the reporting period.
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Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
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| - Definition
Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, netted by jurisdiction and classified as current.
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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.
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Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.
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| - Definition
Amount of obligation due after one year or beyond the normal operating cycle, if longer.
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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