Commitments and Contingent Liabilities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jan. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Number Of Regulatory Commissions	3pny_NumberOfRegulatoryCommissions
Site Contingency [Line Items]
Accrual For Environmental Loss Contingencies Gross	1.1
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	2 years
Telecommunications And Technology Outsourcing Contracts [Member] \| Maximum [Member]
Long-term Purchase Commitment [Line Items]
Long term purchase commitment time period	5 years
Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Total contingent obligation	1.7
Surety Bond [Member]
Guarantor Obligations [Line Items]
Total contingent obligation	6.4

Total number of regulatory commission that have jurisdiction over the service areas in which the company operates.

No definition available.

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- Definition

Undiscounted amount of the accrual for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.Y.Q1)

-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section Y

-Paragraph Question 1

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

+ Details

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- Details

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- Details

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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- Details

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- Definition

Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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