Acquisitions Regency PPA (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 21, 2014 PVR Acquisition [Member]	Mar. 03, 2014 Hoover Midstream Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 13,362	$ 11,449
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets			150	5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			2,687	114
Business Acquisition, Purchase Price Allocation, Investments in Affilaites			62
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			3,079	181
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			5,978	300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities			166	5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt			1,887
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			3	2
Business Combination, Cost of Acquired Entity, Purchase Price			3,922	293
Business Acquisition, Pro Forma Net Income (Loss)	$ 161	$ 84
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 0.29	$ 0.15
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 0.29	$ 0.15

The amount of acquisition cost of a business combination allocated to investments in affilaites.

No definition available.

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- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

No definition available.

+ Details

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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- Definition

Amount of assets acquired at the acquisition date.

+ References

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- Definition

Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

+ Details

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- Definition

Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

+ References

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- Definition

Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

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- Definition

Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

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- Definition

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

+ References

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