Segment Information Table - B/S Data for Each Segment(Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item
Assets	$ 8,782	$ 8,123	$ 5,568
Investments in unconsolidated affiliates	2,097	2,214	1,925
Goodwill	1,128	1,128	790
Gathering And Processing
Segment Reporting, Asset Reconciling Item
Assets	4,748	4,210	1,960
Investments in unconsolidated affiliates	36	35	0
Goodwill	651	651	313
Natural Gas Transportation
Segment Reporting, Asset Reconciling Item
Assets	991	1,232	1,297
Investments in unconsolidated affiliates	991	1,231	1,296
Goodwill	0	0	0
NGL Services
Segment Reporting, Asset Reconciling Item
Assets	1,070	948	629
Investments in unconsolidated affiliates	1,070	948	629
Goodwill	0	0	0
Contract Services
Segment Reporting, Asset Reconciling Item
Assets	1,897	1,672	1,621
Investments in unconsolidated affiliates	0	0	0
Goodwill	477	477	477
Corporate
Segment Reporting, Asset Reconciling Item
Assets	76	61	61
Investments in unconsolidated affiliates	0	0	0
Goodwill	0	0	0
Eliminations
Segment Reporting, Asset Reconciling Item
Assets	0	0	0
Investments in unconsolidated affiliates	0	0	0
Goodwill	$ 0	$ 0	$ 0

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 18

-Article 5

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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