v2.4.0.8

Variable Interest Entities - Narrative (Details) (USD $) In Millions, unless otherwise specified								6 Months Ended			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2014 Variable Interest Entities	Dec. 31, 2013 Variable Interest Entities	Jun. 30, 2014 Variable Interest Entities Chesapeake Granite Wash Trust [Member] Consolidated Entities [Member]	Jun. 30, 2014 Corporate Ownership Requirement [Member] Mineral Acquisition Company I, L.P. [Member] Limited Partner [Member]	Jun. 30, 2014 Corporate Ownership Requirement [Member] Mineral Acquisition Company I, L.P. [Member] Minimum [Member] Limited Partner [Member]	Jun. 30, 2014 Corporate Ownership Requirement [Member] Mineral Acquisition Company I, L.P. [Member] Maximum [Member] Limited Partner [Member]	Jun. 30, 2014 Partner Ownership Requirement [Member] Mineral Acquisition Company I, L.P. [Member] Limited Partner [Member]	Jun. 30, 2014 Partner Ownership Requirement [Member] Mineral Acquisition Company I, L.P. [Member] Maximum [Member] Limited Partner [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 1,462	$ 837	$ 677	$ 287	$ 1	$ 1	$ 1
Proved natural gas and oil properties ($488 and $488 attributable to our VIE)	58,914	56,157			488	488	287
Short-term derivative liabilities ($9 and $5 attributable to our VIE)	417	208			9	5	9
Other current liabilities ($20 and $22 attributable to our VIE)	3,293	3,511			20	22	20
Long-term derivative liabilities ($1 and $0 attributable to our VIE)	389	445			1	0	1
Percentage of acquisition								10.00%			90.00%
Other Commitment										25		225
Percentage of royalty minimum									7.00%
Percentage of royalty maximum										22.50%
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net								$ 9

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Business Acquisition, Percentage of Interests Acquired

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Royalty Rate Lower Limit

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Royalty Rate Upper Limit

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Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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Net carrying amount of the assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), when the reporting entity is not the VIE's primary beneficiary.

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