Estimated Percentage of Environmental Remediation Expense Estimate to be Recovered Through Insurance Proceeds

No definition available.

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- Definition

The gross cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to operating activities. It excludes insurance settlements classified as investing cash flows, for example, insurance settlements related to fixed assets.

+ References

No definition available.

+ Details

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- Definition

The value of the cost reimbursement received as a percentage of the total cost estimate to date related to the Delhi Field release and remediation.

+ References

No definition available.

+ Details

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- Definition

The aggregate amount disbursed during the reporting period to settle 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.Q2)

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

+ Details

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- Definition

The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859

+ Details

Name:	us-gaap_EnvironmentalRemediationExpense
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Balance Type:	debit
Period Type:	duration

- Details

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- Definition

The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to operating activities. It excludes insurance settlements classified as investing cash flows, for example, insurance settlements related to fixed assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 16

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3337-108585

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Commitments and Contingencies (Delhi Field Release) (Details Textuals 3) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended		19 Months Ended
	Oct. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Loss Contingencies [Line Items]
Environmental remediation expense		$ 16.8us-gaap_EnvironmentalRemediationExpense	$ 114.0us-gaap_EnvironmentalRemediationExpense	$ 130.8us-gaap_EnvironmentalRemediationExpense
Environmental remediation expense incurred to date				112.6
Gross proceeds from insurance settlement, operating activities	25.0
Net proceeds from insurance settlement, operating activities	$ 23.9
Insurance reimbursement as a percentage of total cost estimate				20.00%
Maximum [Member]
Loss Contingencies [Line Items]
Estimated percentage of environmental remediation expense estimate to be recovered through insurance proceeds		66.66667%		66.66667%
Minimum [Member]
Loss Contingencies [Line Items]
Estimated percentage of environmental remediation expense estimate to be recovered through insurance proceeds		33.33333%		33.33333%