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)