Amount of consideration to be transferred from the acquirer to the acquiree within one year.

No definition available.

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Amount of liability recognized arising from contingent consideration in a business combination.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

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Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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- Definition

The obligations arising from the sale, disposal, or planned sale in the near future (generally within one year) of a disposal group, including a component of the entity (discontinued operation).

+ References

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-Publisher FASB

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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-Publisher SEC

-Name Regulation S-X (SX)

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Divestitures - Additional Information (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	0 Months Ended
	Feb. 26, 2013	Mar. 31, 2013	Feb. 25, 2014	Mar. 31, 2014
Permian Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of oil and natural gas properties	$ 2,600.0
Loss on sale of oil and gas property		(399.1)
Permian Properties \| Noncontrolling Interest
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of oil and gas property		(71.7)
Gulf Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of oil and natural gas properties			705.0
Contingent consideration, liability			9.4	9.5
Restricted deposits			28.0
Consideration receivable, current				14.0
Gulf Properties \| Asset Retirement Obligations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset retirement obligations assumed			$ 366.0