Share-Based Compensation Share-Based Compensation - Share-Based Compensation Table (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 48	$ 14	$ 0
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Natural Gas and Oil Properties	52	71	112
Share Based Compensation General And Administrative Expense	60	71	92
Share Based Compensation Natural Gas And Oil Production Expenses	21	24	33
Share Based Compensation Allocated To Marketing Gathering And Compression Expense	7	15	17
Share Based Compensation Service Operations Expense	10	10	11
Allocated Share-based Compensation Expense	$ 150	$ 191	$ 265

Share based Compensation Allocated to Marketing, Gathering and Compression Expense

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- Definition

Share Based Compensation Allocated to General And Administrative Expense

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Share Based Compensation, Natural Gas And Oil Production Expenses

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- Definition

Share Based Compensation Allocated to Service Operations Expense

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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