Business Segments Reconciliations To Statements Of Operations (Details) (USD $)	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Net Income (Loss) [Abstract]
Income (Loss) Before Income Taxes for Reportable Segments	$ 103,334,000	$ 92,045,000	$ 264,436,000	$ 233,941,000
Income Taxes	(40,794,000)	(36,255,000)	(104,324,000)	(92,228,000)
Net Income	62,540,000	55,790,000	160,112,000	141,713,000
Segment Reconciliation Abstract
Segment Operating Income (Loss) Before Income Taxes	103,464,000	82,814,000	265,477,000	222,191,000
Utility Income Taxes	(36,190,000)	(31,380,000)	(95,992,000)	(84,679,000)
Non-utility Activities Before Income Taxes	25,000	70,000	133,000	205,000
Operating Income	$ 67,299,000	$ 51,504,000	$ 169,618,000	$ 137,717,000