Commitments and Contingent Liabilities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Number Of Regulatory Commissions	3
Site Contingency [Line Items]
Accrual For Environmental Loss Contingencies Gross	$ (1.2)
Pipeline And Storage Capacity Contacts [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Long term purchase commitment time period	21 years
Gas Supply Contracts [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Long term purchase commitment time period	3 years
Telecommunications And Technology Outsourcing Contracts [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Long term purchase commitment time period	5 years
Manufactured Gas Plant Sites [Member]
Site Contingency [Line Items]
Accrual For Environmental Loss Contingencies Gross	(1.1)
Huntersville Groundwater LNG, LNG Facilities And Underground Storage Tank Liability [Member]
Site Contingency [Line Items]
Accrual For Environmental Loss Contingencies Gross	(0.1)
Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Total contingent obligation	1.8
Surety Bond [Member]
Guarantor Obligations [Line Items]
Total contingent obligation	$ 4.7